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Gregor Mendel Cornell Notes

Cornell Notes
Name: ___________________________________
Class: _________________ Period: ________
Date: ____________________________
Essential Question: Who is the Father of Genetics and what was his contribution to the
understanding of genetics?
Questions/Main Ideas:
Who is Gregor Mendel?
_____________________ was an Austrian monk born in 1822. His
parents were peasants with a background in agriculture. Mendel was an
expert botanist.
Called “The Father of Genetics” because he was one of the first to study
What did Mendel study?
Mendel used ________ ________________ to perform his studies.
He kept ____________ ________________ of his pea plants among
Using_________________, he was able to predict the outcome of his
New and exciting _______________were established!
Why peas?
1. The male and female parts of the pea plant are enclosed inside the
same flower, so it is easy to _________________ ________________.
2. The peas are easy to grow, and they grow___________. They also
produce lots of_______________.
3. Each character of garden peas comes in 2 clearly ______________
____________. For example, they either have purple or white flowers,
or their stems are either long or short.
Which characteristics did he
Mendel studied the following pea characteristics:
1.flower __________2. flower ___________3. ___________color
4. seed_________ 5. __________ shape 6. pod _______7. stem length
Mendel’s Experiments
The P generation consists of the first two true-bred individuals that are
crossed. The P stands for Parental.
The offspring of the P generation is called the______ ____________.
F stands for filial, which means “son” or “daughter”.
Mendel's experiments allowed the F1 generation to________________________________ which creates the_______ _________________,
or the second filial generation.
In the F1 generation all white flowers had disappeared, but in the F2
generation, some had come back!
The ratio seen in the F2 generation was 3:1, 3 purple flowers for each
white flower.
Who is Reginald Punnett?
Mr. Punnett (1875-1967) attended the University of Cambridge and
earned a degree in zoology.
Afterwards he worked at the University as an assistant studying
Farmers already knew that when they bred two animals, the offspring
received characteristics from each parent (though they did not know of
genes nor DNA). However, Punnett was determined to prove that
___________________________________________ among livestock.
He charted out experiments using what he called
In pea plants, round peas are
dominant and wrinkled peas
are recessive. Using the steps,
cross a plant heterozygous for
pea shape and a homozygous
dominant pea plant.
Step 1) Determine the parental cross:
______ x _______
Step 2) Set up Punnett square with parental crosses (outside the box).
Step 3) Fill in the Punnett Square to determine genotypes among
offspring (inside the box).
Step 4) Determine genotypic and phenotypic ratios among offspring.
_____% are homozygous dominant
_____% are heterozygous
_____% are round