Review Codominance, Blood Types, Incomplete Dominance

Front

What is codominance?

Back

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

Front

What is incomplete dominance?

Back

Incomplete dominance occurs when the dominant and recessive traits are blended in the heterozygous genotype, resulting in a phenotype that is a mix of both traits.

Front

What genotype results in white flowers in an incomplete dominance cross where B codes for red flowers and b codes for white flowers?

Back

bb

Front

What genotype codes for blood type O?

Back

ii

Front

What are the phenotypes of the parents in an incomplete dominance cross where B codes for red flowers and b codes for white flowers?

Back

A red flower and a pink flower.

Front

What is the phenotype of a plant with the genotype Bb in an incomplete dominance scenario?

Back

The phenotype will be pink flowers.

Front

In a Punnett square, what does each box represent?

Back

Each box represents a possible genotype of the offspring resulting from the combination of parental alleles.

Front

What blood type is represented by the genotype I^A I^B?

Back

Blood type AB.

Front

What is the expected percentage of offspring with blood type O from a cross between two heterozygous parents (I^A i and I^B i)?

Back

25%.

Front

What is the difference between complete dominance and incomplete dominance?

Back

In complete dominance, the dominant allele completely masks the effect of the recessive allele, while in incomplete dominance, the traits blend together.