Someone whose genotype is bb has a ____% chance of passing on the recessive allele to his offspring.

A heterozygous genotype

A homozygous genotype

A heterozygous genotype

A homozygous recessive genotype

A homozygous dominant genotype

Brown hair is dominant. Red hair is recessive. What's the phenotype of someone who is homozygous dominant for hair color?

Brown hair is dominant. Red hair is recessive. What's the phenotype of someone who is homozygous recessive for hair color?

Brown hair is dominant. Red hair is recessive. What's the phenotype of someone who is heterozygous for hair color?

The ability to roll your tongue is dominant. What's the phenotype of someone whose genotype for tongue-rolling is RR?

The ability to roll your tongue is dominant. What's the phenotype of someone whose genotype for tongue-rolling is Rr?

The ability to roll your tongue is dominant. What's the phenotype of someone whose genotype for tongue-rolling is rr?

A person has blue eyes, which is a recessive trait. What's their genotype?

In pea plants, purple flowers are dominant over white flowers. A purple-flowering pea plant and a white-flowering pea plant are crossed. Half of their offspring are purple; half are white. What were the parent plants' genotypes?