Incomplete 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 alleles.

Front

What is codominance?

Back

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

Front

In a Punnett square, what does a 50% chance of gray offspring indicate in incomplete dominance?

Back

It indicates that when two alleles are crossed, half of the offspring will express the intermediate phenotype.

Front

What is the phenotypic ratio of a cross between a red flower (RR) and a speckled flower (RB) in codominance?

Back

2 red flowers and 2 speckled flowers.

Front

What is the result of crossing a tall plant (TT) with a short plant (SS) in incomplete dominance?

Back

The offspring will be medium height (TS), showing a blend of the two parent traits.

Front

What is the expected outcome when crossing a red radish (RR) with a white radish (WW)?

Back

All offspring will be purple (RW) due to complete dominance.

Front

How does incomplete dominance differ from complete dominance?

Back

In incomplete dominance, the phenotype is a blend of both alleles, while in complete dominance, one allele completely masks the other.

Front

What is an example of codominance in plants?

Back

In flowers, red (RR) and blue (BB) flowers can produce speckled flowers (RB) when crossed.

Front

What does a Punnett square illustrate?

Back

It shows the possible genetic combinations of offspring from two parents.

Front

What is the significance of a 1:2:1 ratio in a genetic cross?

Back

It indicates a typical outcome of a monohybrid cross involving incomplete dominance.