Mendelian Genetics (AP BIO)

Front

The observable traits expressed by an organism are described as its _.

Back

phenotype

Front

In a genetic cross, if one allele is dominant and the other is recessive, what is the expected phenotypic ratio of the offspring?

Back

100% long whiskers if the dominant allele produces long whiskers.

Front

What would be the expected F1 offspring phenotype when crossing true-breeding yellow seed plants with true-breeding green seed plants?

Back

100% yellow seeds.

Front

What is the purpose of a test cross in genetics?

Back

To determine the genotype of an organism with a dominant phenotype by crossing it with a homozygous recessive organism.

Front

What is the most likely genotype of a purple-flowered plant that produces both purple and white offspring when crossed with a white-flowered plant?

Back

Pp (heterozygous).

Front

A recessive trait will be observed in individuals that are _.

Back

homozygous for the recessive allele.

Front

Define allele.

Back

An allele is a variant form of a gene that can produce different traits.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup of an organism, while phenotype refers to the observable traits.

Front

What does it mean for an allele to be dominant?

Back

A dominant allele is one that expresses its trait even when only one copy is present in the genotype.

Front

What is a homozygous genotype?

Back

A homozygous genotype has two identical alleles for a particular gene.