Incomplete and Codominance Practice

Front

What is a recessive allele?

Back

An allele whose trait only shows up when no dominant allele is present.

Front

What do heterozygous flowers with genotype (RB) look like if red flowers are (RR) and blue flowers are (BB)?

Back

Speckled blue and red.

Front

What inheritance pattern is shown when both alleles in a heterozygote are fully expressed?

Back

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.

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

Give an example of incomplete dominance.

Back

A red flower (RR) crossed with a white flower (WW) produces pink flowers (RW).

Front

Give an example of codominance.

Back

A red flower (RR) crossed with a blue flower (BB) produces flowers that are speckled red and blue (RB).

Front

What is the difference between complete dominance and codominance?

Back

In complete dominance, the dominant allele completely masks the effect of the recessive allele, while in codominance, both alleles are expressed equally.

Front

What is the phenotype of a plant with genotype (Rr) if R is dominant for red flowers and r is recessive for white flowers?

Back

Red flowers.

Front

What is the genotype of a plant that shows the recessive phenotype?

Back

It must be homozygous recessive (rr).