Punnett Square Practice

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the genetic makeup of offspring from a cross between two parents.

Front

What does the letter 'A' represent in genetics?

Back

The letter 'A' typically represents a dominant allele, such as brown hair.

Front

What does the letter 'a' represent in genetics?

Back

The letter 'a' typically represents a recessive allele, such as blond hair.

Front

What are genotypes?

Back

Genotypes are the genetic constitution of an individual, represented by letters (e.g., AA, Aa, aa).

Front

What are phenotypes?

Back

Phenotypes are the observable traits of an individual, such as hair color or eye color.

Front

What is the probability of getting a homozygous dominant offspring (AA) from a cross of AA and Aa?

Back

50%.

Front

What is the probability of getting a homozygous recessive offspring (aa) from a cross of Aa and Aa?

Back

25%.

Front

What is the expected phenotype ratio from a monohybrid cross?

Back

The expected phenotype ratio is 3:1 for dominant to recessive traits.

Front

What is a dominant trait?

Back

A dominant trait is one that is expressed in the phenotype even if only one copy of the allele is present.

Front

What is a recessive trait?

Back

A recessive trait is one that is expressed in the phenotype only when two copies of the allele are present.