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 it mean to be a carrier of a genetic disease?

Back

A carrier is an individual who has one copy of a recessive allele for a genetic trait or disease but does not exhibit the trait or disease themselves.

Front

What is the difference between homozygous and heterozygous genotypes?

Back

Homozygous means having two identical alleles for a trait (e.g., BB or bb), while heterozygous means having two different alleles for a trait (e.g., Bb).

Front

If purple flowers are dominant to white flowers, what phenotype does a plant with genotype Pp exhibit?

Back

The phenotype is purple flowers.

Front

What percentage of offspring will be white-flowered if two white-flowered plants are crossed?

Back

100% of the offspring will be white-flowered.

Front

What is a dominant trait?

Back

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

Front

What is a recessive trait?

Back

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

Front

How do you determine the phenotype from a genotype?

Back

The phenotype is determined by the expression of the alleles in the genotype, where dominant alleles mask the effects of recessive alleles.

Front

What does it mean if a trait is expressed as 2 out of 4 in a genetic cross?

Back

It means that there is a 50% chance that the offspring will inherit that trait.

Front

What is the significance of the genotype BB?

Back

The genotype BB indicates that the individual is homozygous for the dominant trait.