Incomplete Dominance and Codominance

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 genetic situation where both alleles in a gene pair are fully expressed, resulting in offspring with a phenotype that is neither dominant nor recessive.

Front

Give an example of incomplete dominance in animals.

Back

In cats, the fur color can be black, white, or gray due to incomplete dominance.

Front

Give an example of codominance in animals.

Back

In calico cats, both black and tan colors are expressed in the fur.

Front

What is the phenotype ratio in a cross showing incomplete dominance?

Back

Typically, the phenotype ratio is 1:2:1 for a monohybrid cross.

Front

What is the genotype ratio in a cross showing codominance?

Back

The genotype ratio is typically 1:2:1 for a monohybrid cross.

Front

In a Punnett square for incomplete dominance, what percentage of offspring will show the intermediate phenotype?

Back

50% of the offspring will show the intermediate phenotype.

Front

In a Punnett square for codominance, what percentage of offspring will show both traits?

Back

50% of the offspring will show both traits.

Front

What does a Punnett square illustrate?

Back

A Punnett square illustrates the possible genetic combinations from a cross between two parents.

Front

What is the significance of the F1 generation in genetics?

Back

The F1 generation is the first filial generation, which is the result of a cross between two parental (P) generations.