Complex inheritance patterns

Front

What is incomplete dominance?

Back

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

Front

What is codominance?

Back

A form of inheritance where both alleles in a heterozygote are fully expressed, resulting in offspring with a phenotype that is neither dominant nor recessive.

Front

What are multiple alleles?

Back

A situation in which three or more alleles exist for a particular gene, leading to a variety of possible phenotypes.

Front

What is polygenic inheritance?

Back

A type of inheritance where multiple genes (often located on different chromosomes) influence a single trait, resulting in a continuous range of phenotypes.

Front

What is a sex-linked trait?

Back

A trait that is associated with a gene that is carried on one of the sex chromosomes (X or Y), often affecting males and females differently.

Front

What is the expected phenotype ratio when a pink flower (Rr) is crossed with a white flower (rr) in snapdragons?

Back

50% White: 50% Pink.

Front

What must an XX female have to express a recessive sex-linked trait?

Back

Two recessive alleles.

Front

What is complete dominance?

Back

A form of inheritance where the dominant allele completely masks the effect of the recessive allele in a heterozygote.

Front

What is an example of a trait that exhibits codominance?

Back

ABO blood type in humans, where both A and B alleles are expressed.

Front

How many alleles are involved in multiple allele inheritance?

Back

More than two alleles.