Punnett Square Practice

How many copies of each gene do you receive from your parents?

What are the two different versions of the same gene (example: tall or short)?

Capital letters represent ______ alleles.

Lowercase letters represent ______ alleles.

The letter combination (ex: Aa, AA, or aa) is the _________.

The traits that can be seen (observed) are the _______.

Freckles (F) are dominant to no freckles (f). Which two genotypes represent freckles? Select two.

Freckles (F) are dominant to no freckles (f). Which genotype represents no freckles?

Dimples (D) are dominant to no dimples (d). Which two genotypes represent dimples? Select two.

Dimples (D) are dominant to no dimples (d). Which genotype represents no dimples?

Widow's peak hairline (A) is dominant to straight (a). If a person has the genotype Aa, what would their phenotype be?

Widow's peak hairline (A) is dominant to straight (a). If a person has the genotype aa, what would their phenotype be?

Purple is dominant to white for flower color in pea plants. If a purple flowered pea plant (PP) is crossed with a white flowered plant (pp), what color will the offspring be?

Black fur is dominant to yellow fur in Labrador retrievers. If two heterozygous Labradors are crossed, what would the probable fur color of their offspring be?

JoAnne owns a horse ranch with new foals (baby horses). There are three black foals and one chestnut foal. Black coat color (B) is dominant to chestnut coat color (b).

What MOST likely are the genotypes of the parents?

Freckles are dominant (F) and no freckles are recessive (f). Two parents' genotypes are crossed and their offspring have a 3/4 chance of having freckles and 1/4 chance of not having freckles. Which Punnett square shows the cross and its offspring?

Cystic fibrosis is a recessive genetic disorder. If only one gene is present, an individual is a carrier. What is the probability of two healthy cystic fibrosis carriers having a child that has the disease?