Easy Punnett Squares
Hard Punnett Squares
Vocabulary
Random
Class Notes
100
Complete a punnet square for TT and tt.
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, Gg, Ee. Each of these are _______________.
What is heterozygous.
100
The method we use today to predict the traits of offspring is ________________ .
What is the Punnett Square.
200
Complete a Punnett square for Gg and Gg.
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 (TT) are called __________________.
What is homozygous.
200
HH, TT, GG. 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 cross between a heterozygous for tall tree and a homozygous for short tree. Tall is dominant.
What is Tt, Tt, tt, tt
300
Mike is heterozygous for brown eyes. His wife has blue eyes. What percentage of their children will most likely have brown eyes? What percentage will most likely have blue eyes?
What is 50% brown and 50% blue eyes?
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? Tall is dominant.
What is 25% chance.
300
A _______________ trait is a trait that is expressed or shown.
What is dominant.
400
Complete a Punnett square for someone who is Homozygous for Brown eyes and someone who has blue eyes. Brown is dominant over blue.
What is Bb, Bb, Bb, Bb.
400
Tim and Jenny both have dark skin, but each of them carry a recessive trait for light skin. What are the chances that their children will have dark skin? Light skin?
What is 75% dark skin and 25% light skin.
400
___________________ describes the genetic code or a pair of alleles and is represented by letters such as Tt or TT.
What is genotype.
400
GG, Gg, Gg, gg. Brown eyes are dominant to blue eyes. What percent have Brown 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
Dad has blue eyes. Mom has blue eyes. All of their children have blue eyes. But Grandma has Brown eyes. What is the genotype of Grandad?
What is Bb.
500
James is heterozygous for big lips. His wife also has big lips, but one of their children has small lips. What is his wife's genotype?
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. Hint: Think genotype first.

Identify which allele is dominant, and show a Punnett square.

What is....
500
When neither of the 2 alleles are dominant to each other that is called ___________.
What is Co-Dominance.
M
e
n
u