Genetics- Dihybrid Punnett Squares

Front

What is the genotype for brown eyes if E = brown eyes and e = blue eyes?

Back

E = brown eyes

Front

What is the genotype for blue eyes if E = brown eyes and e = blue eyes?

Back

ee = blue eyes

Front

What is the phenotype of an individual with genotype Ee?

Back

Brown eyes

Front

What is the phenotype of an individual with genotype ee?

Back

Blue eyes

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup (e.g., Ee, ee), while phenotype refers to the observable traits (e.g., brown or blue eyes).

Front

What is a Punnett Square?

Back

A Punnett Square is a tool used to predict the possible genotypes of offspring from certain parents.

Front

What are the possible genotypes from a cross of Aa and Bb?

Back

Possible genotypes: AABB, AABb, AaBB, AaBb, Aabb, Aabb, aabb.

Front

What fraction of offspring from the cross AaBB x Aabb will be heterozygous for both traits (AaBb)?

Back

1/2

Front

If TT = 25%, Tt = 50%, and tt = 25%, what are the possible genotypes for a cross of Tt x Tt?

Back

TT = 25%, Tt = 50%, tt = 25%.

Front

What does heterozygous mean?

Back

Heterozygous means having two different alleles for a trait (e.g., Aa).