Punnett Squares
Word Problems
Vocabulary
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100

Complete a cross of TT and tt. What are all possible genotypes?

What is Tt, Tt, Tt, Tt

100

Jimmy has a big nose. His genotype is GG. Sally also has a big nose. Her genotype is Gg. What are the possibilities for their children's genotypes?

What is GG, GG, Gg, Gg

100
___________ is the passing down of traits from one generation to the next.
What is Heredity.
100

Hh, Zz, Xx. Each of these are _______________.

What is heterozygous.

100

The table we use to predict the traits of offspring is ________________ .

What is the Punnett Square.

200

Complete a Punnett square for Gg and Gg. What are all possible genotypes?

What is GG, Gg, Gg, gg

200

Jared is homozygous for brown hair. His wife is homozygous for blonde hair. Brown hair is dominant to blonde hair. What are the possible genotypes for their children?

What is Bb, Bb, Bb, Bb.

200
A pair of alleles that are the same are called __________________.
What is homozygous.
200

HH, TT, zz. Each of these are ______________________.

What is homozygous.

200

Capital letters are always represented by the _____________ allele, not the recessive allele.

What is dominant.

300

Complete a Punnett square with someone who is heterozygous for tall and for someone who is homozygous for short.

What is Tt, Tt, tt, tt

300
  1. Tim and Jenny both have dark skin, but each of them carry a recessive trait for light skin. (They are both heterozygous) What are the chances that their children will have light skin?

What is 25% light skin. 

300
A pair of alleles that are different are called ____________________.
What is heterozygous.
300

Jim and Jane are both heterozygous for being tall. What are the chances that they will have a short child?

What is 25% chance.

300

A _______________ trait is a trait that is expressed or shown if the allele is present.

What is dominant.

400

If you cross a homozygous recessive plant (yy) for seed color, and a heterozygous (Yy) plant. What is the probability of having offspring with Yellow seeds? Yellow is the dominant trait.

What is 50% or 1/2.

400

Tim and Jenny both have dark skin, but each of them carry a recessive trait for light skin. (They are both heterozygous) What are the chances that their children will have dark skin?

What is 75% dark skin.

400
___________________ describes a pair of alleles and is represented by letters such as Tt or TT.
What is genotype.
400
GG, Gg, Gg, gg. Green eyes are dominant to blue eyes. What percent have green eyes? What percent have blue eyes?
What is 75% and 25%.
400

A ______________ trait is a trait that is hidden by the dominant gene.

What is recessive.

500

The four answers for a Punnett square are ZZ, Zz, Zz, and zz. What are the genotypes for the parents?

What is Zz and Zz

500

James is heterozygous for big lips. His wife also has big lips. If just 1 of their 4 children have small lips. What is his wife's genotype most likely?

What is Bb.

500

__________________ is simply the expression of the genotype. It is how the trait is expressed (ie. dark hair, tall, big lips, etc.)

What is phenotype.

500
Write a word problem that will have the following results: The children have a 50% chance of having straight teeth and a 50% chance of having crooked teeth.
What is....
500

What is the difference between phenotype and genotype?

What is phenotype is a physical characteristic. Genotype refer to the combination of alleles.

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