Punnett Squares

Front

What is the term for the physical appearance of an organism?

Back

Phenotype

Front

What is the result of crossing a homozygous dominant brown mouse with a heterozygous brown mouse (tan is the recessive color)?

Back

100% brown

Front

What are Aa, DD, bB, yy examples of?

Back

Genotypes

Front

Which of the following is homozygous dominant: Yy, Y, yy, YY?

Back

YY

Front

How are dominant alleles represented?

Back

By a capital letter

Front

What is the term for the genetic makeup of an organism?

Back

Genotype

Front

If a trait is recessive, what must be true for it to be expressed in the phenotype?

Back

The organism must be homozygous recessive.

Front

What is the expected phenotypic ratio from a monohybrid cross of two heterozygous parents?

Back

3:1

Front

What does it mean if an organism is heterozygous for a trait?

Back

It has two different alleles for that trait.

Front

What is the purpose of a Punnett square?

Back

To predict the genotypes and phenotypes of offspring from a genetic cross.