Genetics Test Review

Front

What causes the change in fur color of the arctic fox during different seasons?

Back

Temperature changes.

Front

What does independent assortment refer to in genetics?

Back

The principle that alleles for different traits are distributed to gametes independently of one another.

Front

What is the genotype required for a corn plant to produce only white seeds?

Back

Homozygous recessive (ww).

Front

What is the expected genotypic ratio when crossing a brown cocker spaniel (bb) with a heterozygous black cocker spaniel (Bb)?

Back

0 BB: 1bb: 1Bb.

Front

What is the expected outcome of crossing two heterozygous tomato plants for hairy stems?

Back

75% hairy, 25% hairless.

Front

Define dominant allele.

Back

An allele that expresses its phenotype even in the presence of a recessive allele.

Front

Define recessive allele.

Back

An allele that only expresses its phenotype when homozygous.

Front

What is a homozygous genotype?

Back

A genotype consisting of two identical alleles for a trait.

Front

What is a heterozygous genotype?

Back

A genotype consisting of two different alleles for a trait.

Front

What is genetic linkage?

Back

The tendency of genes located close to each other on a chromosome to be inherited together.