Punnett Squares
Word Problems
Vocabulary
Random
Class Notes
100

Complete a Punnett square for parents 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, Zz, Xx. 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 parents 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 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 someone who is heterozygous for tall and for someone who is homozygous for short. T=tall t=short

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?
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 a pair of alleles and is represented by letters such as Tt or TT.

What is genotype.

400

Brown eyes are dominant to blue eyes. What percent of the genotypes listed below have brown eyes? What percent have blue eyes?

BB, Bb, Bb, bb

What is 75% brown and 25% blue.

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, zz. What are the genotypes for the parents?

What is Zz and zz.

500

James is heterozygous for big teeth. His wife also has big teeth, but one of their children has small teeth. What is his wife's genotype?   

T=big teeth, t=small teeth

What is Tt.

500

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

What is phenotype.

500

The Smith children have a 50% chance of having straight teeth and a 50% chance of having crooked teeth. Create a Punnett square to show the parent's and offspring's genotypes.  S=straight  s=crooked

What is            S             s

            s       Ss            ss

            s       Ss            ss

500

What is the last name of the man who used pea plants to study genetics?

Who is Mendel.

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