Front

What is incomplete dominance?

Back

A genetic situation in which one allele does not completely dominate another allele, resulting in a phenotype that is a blend of the two alleles.

Front

What is codominance?

Back

A genetic situation where both alleles in a heterozygote are fully expressed, resulting in offspring with a phenotype that shows both traits.

Front

What are sex-linked traits?

Back

Traits that are associated with genes located on the sex chromosomes, often affecting males and females differently.

Front

What is the genotype of a homozygous black-feathered chicken?

Back

BB (two dominant alleles for black feathers).

Front

What is the genotype of a homozygous white-feathered chicken?

Back

WW (two dominant alleles for white feathers).

Front

What is the phenotype of a heterozygous Manx cat (Tt)?

Back

Short tail (due to incomplete dominance).

Front

What are the possible genotypes for type B blood?

Back

I^BI^B or I^Bi.

Front

What is the phenotype of the offspring from a homozygous black mouse and a homozygous white mouse?

Back

100% gray fur (due to incomplete dominance).

Front

How is gender determined in humans?

Back

By the combination of sex chromosomes from the parents; XX for female and XY for male.

Front

What is the phenotype ratio of offspring from a long-tailed cat (T) and a short-tailed cat (Tt)?

Back

50% long-tailed, 50% short-tailed.