Upload
others
View
19
Download
1
Embed Size (px)
Citation preview
GENETIC
INHERITANCE
Subtopics
Mendelian
Genetics
(C1)
Deviations From The
Mendelian Inheritance
(C1)
Genetic
Mapping
(C1)
4.1
4.2
4.3
Learning
outcomes
4.1: Mendelian Gene
a)Define the terminologies used in genetic inheritance
b)State the characteristics of Mandel’s pea plants
c)State Mendel’s first law
d)State Mendel’s second law
e)Construct genetic diagram
4.2: Deviations from the Mendelian Inheritance
- Define types of inheritance that deviate from
Mendelian
4.3: Genetic Mapping- Define genetic mapping
heterozygous
homozygous
genotype
phenotype
dominantAllele
Selfcross
gene
Terminologies Used In
Genetic Inheritance
Test
cross
recessive Locus
Content Here
Content
Content Here
Alleles
Alternative forms of a gene for a trait
occupying the same locus on
homologous chromosomes
Terminologies Used In
Genetic Inheritance
Genes
Content Here
Content
Content Here
Alleles
Terminologies Used In
Genetic Inheritance
A heritable unit consisting of a
specific nucleotide sequence in DNA
that controls a specific characteristic
or phenotype of an organism
Genes
Locus
Content Here
Content
Content Here
Alleles
Terminologies Used In
Genetic Inheritance
The position on a homologous
chromosome where a gene is
located
Genes
Locus
Content Here
Content
Content Here
Alleles
Terminologies Used In
Genetic Inheritance
Genotype • Genetic composition of an
individual; combination of alleles it
possesses.
• or the alleles possessed by an
individual
.
Genes
Locus
Content Here
Content
Content Here
Alleles
Terminologies Used In
Genetic Inheritance
Genotype
Phenotype• The observable characteristics of
an organism.
Content Here
Content
Content Here
Homozygous
Terminologies Used In
Genetic Inheritance
An organism that has a pair of
identical alleles for a gene.
HeterozygousAn organism that has TWO
different alleles for a gene.
Content Here
Content
Content Here
Homozygous
Terminologies Used In
Genetic Inheritance
Heterozygous
Dominant allele
Recessive allele
• An allele which express its
phenotype even in heterozygous
form.
• An allele that only express its
phenotype when present in the
homozygous form.
Content Here
Content
Content Here
Test cross
Terminologies Used In
Genetic Inheritance
Individual of unknown genotype with
dominant phenotype is crossed to a
recessive homozygous individual
Content Here
Content
Content Here
Test cross
Terminologies Used In
Genetic Inheritance
Transfer of the pollen grain from the
anther to the stigma of either the
same or genetically similar flowerSelf crosss/
self pollination
Characteristics Of
Mendel’s pea plants
Easy to
grow
Short life
cycle/mature
quickly
Produce large
number of
offspring from
each mating
Many easily
observable
characteristics
Pea plants can
self-pollinate
or cross-
pollinate
Characteristics Of
Mendel’s pea plants
Mendel’s LAW FIRST
LAW
The TWO alleles
for a heritable
character
SEGREGATE
during gamete
formation & end up
in different
gametes.
Mendel’s SECOND
LAW
Each PAIR of
alleles
SEGREGATES
INDEPENDENTLY
of each other pair
of alleles during
gametes
formation.
Thank
you