Genes and Alleles

Front

What is the dominant allele for fur color in mice?

Back

Black fur (B) is the dominant allele.

Front

What is the recessive allele for fur color in mice?

Back

Brown fur (b) is the recessive allele.

Front

What phenotype does a Bb mouse exhibit?

Back

Black fur.

Front

What phenotype does a bb mouse exhibit?

Back

Brown fur.

Front

What is the definition of genotype?

Back

The genotype is the set of alleles that an organism has.

Front

What is the definition of phenotype?

Back

The phenotype is the observable expression of a trait.

Front

What is a trait?

Back

A trait is an observable characteristic of an organism.

Front

What is an allele?

Back

An allele is a variant form of a gene.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene.