Incomplete Dominance & Co-dominance

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 Co-dominance?

Back

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

Front

Example of Incomplete Dominance in plants?

Back

When a red flower (RR) is crossed with a white flower (WW), the offspring may have pink flowers (RW).

Front

Example of Co-dominance in animals?

Back

In calico cats, both orange and black fur colors are expressed simultaneously.

Front

What is the phenotype of a plant with genotype TS in Incomplete Dominance?

Back

The phenotype would be intermediate, such as a medium height plant.

Front

How does Incomplete Dominance differ from Complete Dominance?

Back

In Complete Dominance, one allele completely masks the effect of another, while in Incomplete Dominance, both alleles contribute to the phenotype.

Front

What is a key characteristic of Co-dominance?

Back

Both alleles are expressed equally in the phenotype, such as in blood types AB.

Front

What type of inheritance is shown when a black chicken (BB) and a white chicken (WW) produce grey offspring (BW)?

Back

Incomplete Dominance.

Front

What is the result of crossing two heterozygous individuals in Incomplete Dominance?

Back

The offspring will show a phenotypic ratio of 1:2:1 (one homozygous dominant, two heterozygous, one homozygous recessive).

Front

In Co-dominance, what happens when a red flower (RR) is crossed with a white flower (WW)?

Back

The offspring will have both red and white patches (RW).