Genetics Review

Front

What is the phenotype of an organism with genotype Bb?

Back

brown

Front

What percentage of offspring will be roan when crossing a roan cow (RW) with a red cow (RR)?

Back

50%

Front

Which genotype is heterozygous?

Back

Dd

Front

If a man with Type B blood (BO) marries a woman with Type A blood (AA), what are the possible blood types of their offspring?

Back

A, AB

Front

In snapdragons, if a red flower (Rr) is crossed with a white flower (rr), what is the phenotypic ratio of the offspring?

Back

2 pink: 2 white

Front

What does it mean for a trait to be dominant?

Back

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

Front

What is the definition of a genotype?

Back

The genotype is the genetic makeup of an organism, represented by the alleles it possesses.

Front

What is the difference between homozygous and heterozygous genotypes?

Back

Homozygous genotypes have two identical alleles (e.g., AA or aa), while heterozygous genotypes have two different alleles (e.g., Aa).

Front

What is incomplete dominance in genetics?

Back

Incomplete dominance is when the phenotype of a heterozygote is intermediate between the phenotypes of the two homozygotes.

Front

What are alleles?

Back

Alleles are different versions of a gene that determine specific traits.