Incomplete Dominance Codominance

Front

What is codominance?

Back

Codominance is a type of inheritance where both alleles in a heterozygous organism contribute equally and visibly to the organism's phenotype. For example, in flowers, red (F^R) and blue (F^B) alleles can produce speckled flowers (F^RF^B).

Front

What is incomplete dominance?

Back

Incomplete dominance is a type of inheritance where the phenotype of a heterozygote is intermediate between the phenotypes of the two homozygotes. For example, crossing red (RR) and white (WW) flowers may produce pink (RW) flowers.

Front

What is the phenotypic ratio when crossing a red flower (F^RF^R) with a speckled flower (F^RF^B)?

Back

50% red, 50% speckled.

Front

What type of inheritance pattern is shown when both alleles are expressed equally in the phenotype?

Back

Codominance.

Front

What antibodies are present in the plasma of a person with blood type A?

Back

B antibodies.

Front

What antigens are present on the surface of red blood cells in a person with blood type AB?

Back

Both A and B antigens.

Front

What is an example of codominance in animals?

Back

A calico cat shows both orange and black fur, demonstrating codominance.

Front

What is the difference between codominance and incomplete dominance?

Back

In codominance, both alleles are fully expressed, while in incomplete dominance, the phenotype is a blend of the two alleles.

Front

If a flower with genotype F^RF^B is crossed with a flower with genotype F^BF^B, what are the possible phenotypes?

Back

100% blue and 50% speckled.

Front

What is the genotype of a speckled flower?

Back

F^RF^B.