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2.5.6 Genetic Inheritance2.5.7 Causes of Variation
2.5.8 Evolution
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Q. What term is used to describe an individual’s genetic make-up?
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
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Q. Explain the term recessive.
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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Q. What is an allele?
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
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Q. Explain homozygous
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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Q. What is meant by phenotype?
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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Q. Explain the term dominant.
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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Q. Explain heterozygous.
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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Q. What is ‘junk’ DNA?
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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Q. What is linkage?
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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Q. Human males and females differ in one of their twenty three pairs of chromosomes. What name is given to this pair of
chromosomes?Allele only expressed in the
homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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Q. What is sex-linkage?
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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Q. How many possible gametes can a parent of genotype Aa produce?
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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Q. Name the sex chromosomes that are present in a human male cell.
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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Q. What is incomplete dominance?
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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Q. Name the sex chromosomes that are present in a human female cell.
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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Q. A spontaneous change in the genetic material of an organism is called a ...
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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Q. A change in the structure of DNA is a … and may give rise to a …
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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Q. Name a scientist responsible for the Theory of Natural Selection
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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Q. State two types of evidence used to support the theory of evolution.
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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Q. How many possible gametes can a parent of genotype AaBb produce?
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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Q. Give two causes of mutation.
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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Q. What is meant by the term evolution?
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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Q. What is Natural Selection?
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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Q. What is meant by genetic screening?
Allele only expressed in the homozygous condition
Chemicals; Radiation; Viruses; Carcinogens
Fossils; Embryos; Anatomy; Genetics
Does not code for a protein
Different alleles or genes
Genotype
Genes on the same chromosome
Genes located on sex (X or Y) chromosome
Four
Identical alleles or genes
Mutation
Neither allele masks the expression of the other
Organisms best suited to environment have greater
chance of breeding and survivalPhysical appearance; Expression of genotype; Result of genotype
+ environment
Heterosomes; Sex chromosomes
XY
Two
Testing people for the presence of a specific gene
XX
Allele that is always expressed
Inheritable change within a population in response
to change in the environment by natural
selection over time
Alternative form of a gene
Mutation; Variation
Darwin; Wallace
CONGRATULATIONS
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