Set up Cornell Notes 11-1 The Work of Gregor Mendel
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Gregor Mendel Austrian live in the mid 1800s Born to peasant
farmers Became a monk and lived in a monastery
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Gregor Mendel Father of Genetics Experimented garden plants and
small farm animals to understand genetics. Known mostly for his
experiments with pea plants
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Genetics Scientific study of heredity The study of how parents
pass down traits to their offspring
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Inheritance The passing of traits from parents to
offspring.
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Mendels Experiments Mendel Cross Pollinated Pea Plants and
Studied how their traits were passed from 1 generation to the next
Kept DETAILED records (Data) Analyzed data and came up with
conclusions that eventually were turned into the laws of
genetics
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Mendel and Hawkweed
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Trait Specific characteristic that varies from one individual
to another Traits Mendel looked at: Short
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What is Probability? Question: If I toss a penny 50 times, how
many times will it land on heads? Hypothesis: Data: Heads Tails
Totals: %Heads & %Tails Conclusion:
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Probability Question: If we add up all of the coin tosses in
the class, what do you think the percentage of times did the
pennies land heads? Hypothesis: Data: Totals% heads tails
Conclusion:
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Probability Question: If we add up all of the coin tosses in
all of Ms. Haus classes, what do you think the percentage of times
did the pennies land heads? Hypothesis: Data: Totals% heads tails
Conclusion:
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Probability Its the likelihood that an event will happen Its
Not Exact One event does not affect the next The more times you
repeat an event the more likely youll get closer to your predicted
outcome.
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Purebred/ Homozygous Genetically pure for a particular trait.
Both genes are the same for a trait. Parents Offspring TT = tall
& tt = short
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What do you think the outcome was?
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Hybrid / Heterozygous Have two different forms of a gene
dogfoose.wordpress.com Tt = Tall
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Gene A segment on a chromosome consisting of a long sequence of
nitrogen bases that code for a protein. (Proteins do the work in
cells and determine traits)
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Allele Different form of a gene OR Example: Gene for Plant
height -Allele for Tall OR -Allele for Short
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Mendels Principle of Dominance States that some alleles are
dominant and others are recessive.
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Dominant Allele The stronger form of a gene. Represented by the
capital letter of the dominant trait. (T=tall) If present will be
the trait that is expressed.
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Recessive Allele The weaker form of a gene. Is represented with
a lower case letter. (t=short) Recessive trait hides unless both
genes are the recessive allele.
http://media.bigoo.ws/content/gif/cartoon/cartoon_212.gif
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Genetic Data Collection The first set of parents were called
the P generation The resulting offspring were called the F 1
generation The offspring of the F 1 generation were called the F 2
generation P- generation F 1 - generation F 2 - generation
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Gamete Sex cells (Egg & Sperm)
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Fertilization When male and female reproductive cells join Egg
& Sperm Or Pollen & Egg
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Zygote Fertilized Egg
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Segregation All living things contain 2 genes for every trait,
one from their mother and one from their father During production
of sex cells the chromosomes separate so that each gamete have only
1 set of chromosomes
