Punnett Squares

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.

Front

What does the term 'phenotype' refer to?

Back

Phenotype refers to the observable physical or biochemical characteristics of an organism, determined by both genetic makeup and environmental influences.

Front

What does the term 'genotype' refer to?

Back

Genotype refers to the genetic constitution of an individual, specifically the alleles present for a particular gene.

Front

If purple flowers are dominant to white flowers, what is the phenotype of a plant with genotype Pp?

Back

Purple.

Front

If purple flowers are dominant to white flowers, what is the phenotype of a plant with genotype pp?

Back

White.

Front

What is the probability of obtaining a purple flower from a cross between two heterozygous purple flower plants (Pp x Pp)?

Back

75%.

Front

What is the probability of obtaining a white flower from a cross between two heterozygous purple flower plants (Pp x Pp)?

Back

25%.

Front

If a heterozygous black-eyed guinea pig (Bb) is crossed with a red-eyed guinea pig (bb), what is the probability that the offspring will have red eyes?

Back

50%.

Front

If two heterozygous black-eyed guinea pigs (Bb x Bb) are crossed, what is the probability that the offspring will have black eyes?

Back

75%.

Front

What is the expected genotypic ratio from a cross between two heterozygous individuals (Aa x Aa)?

Back

1 AA : 2 Aa : 1 aa.