Dihybrid Crosses

Front

What is the hidden form of an inherited trait?

Back

Recessive trait

Front

What do the genotypes AA and Aa always show up as?

Back

Dominant

Front

Which of the following genotypes is heterozygous: Bb, BB, bb, or B?

Back

Bb

Front

If two brown-eyed parents (Bb) have a baby, what is the chance the baby is blue-eyed?

Back

25% chance

Front

Based on a Punnett square, what fraction of the offspring will have wrinkled, yellow seeds if the ratio is 9:3:3:1?

Back

3/16

Front

What is a dihybrid cross?

Back

A genetic cross that involves two traits, each represented by two alleles.

Front

What is the phenotypic ratio of a dihybrid cross between two heterozygous parents (AaBb x AaBb)?

Back

9:3:3:1

Front

Define dominant trait.

Back

A trait that is expressed when at least one dominant allele is present.

Front

Define recessive trait.

Back

A trait that is only expressed when two recessive alleles are present.

Front

What is a genotype?

Back

The genetic makeup of an organism, represented by alleles.