Genes (not Jeans!) Part 3: Punnett Square Intro

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Genes (not Jeans!)
Part 3: Punnett Square Intro
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What do you know about Mendel’s experiments?
Why is he called the Father of Genetics?
Mendel determined that some traits are
dominant
_____________
and show up more often,
recessive
while some traits are ______________
and
seem to hide or skip generations.
Genetics Word Problem:
Brown eyes are dominant to blue eyes. If mom
has a heterozygous genotype and dad has a
homozygous recessive phenotype, what is the
probability of offspring with blue eyes?
Translation:
Since Mrs. F’s mom had brown eyes
and her dad had blue eyes, figure out
the chances that Mrs. F (or her
brothers and sisters) would end up
with blue eyes.
6 Key Terms
1)Dominant
2)Recessive
3)Genotype
4)Phenotype
5)Homozygous
6)Heterozygous
Frayer Model
Using Quizlet for Vocabulary Review
Set up the next page of your notebook like this
Picture
Explanation
Punnett Square
Let’s explain Mendel’s
Pea Plant Experiment
using
Punnett Squares
T
T
t Tt
Tt
t Tt
Tt
T
t
Gregor Mendel’s
Punnett Square
Video
Genetics Word Problem #1:
Brown eyes are dominant to blue eyes. If mom
has a heterozygous genotype and dad has a
homozygous recessive phenotype, what is the
probability of offspring with blue eyes?
How to do Punnett Squares
We will use Punnett Square Word Problems Set Up #1 in
your interactive notebook to work through this problem.
1.
2.
3.
4.
Read and Translate the word problem
Draw Punnett Square
Fill in the Punnett Square for the potential offspring.
Answer the question.

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