Codominance vs incomplete dominance

Front

What is codominance?

Back

Codominance is a genetic scenario where both alleles in a heterozygote are fully expressed, resulting in offspring with a phenotype that is neither dominant nor recessive. Example: A flower with both red and white petals (RW).

Front

What is incomplete dominance?

Back

Incomplete dominance is a genetic scenario where the phenotype of a heterozygote is intermediate between the phenotypes of the two homozygotes. Example: A red flower (RR) crossed with a white flower (WW) produces pink flowers (RW).

Front

What is the phenotype of a plant with genotype SC in hair form gene?

Back

The phenotype of a plant with genotype SC is wavy hair, as it is the result of incomplete dominance between straight hair (SS) and curly hair (CC).

Front

If two wavy-haired parents (SC) have children, what is the probability of having a child with wavy hair?

Back

The probability of having a child with wavy hair (SC) is 50%.

Front

What does a Punnett square represent in genetics?

Back

A Punnett square is a diagram that predicts the genotypes of offspring from a cross between two parents, showing the probability of each genotype.

Front

In a cross between a black (BB) and a white (WW) animal, if the offspring are grey (BW), what type of inheritance is this?

Back

This is an example of incomplete dominance.

Front

What is the expected phenotype ratio in the offspring of a cross between two heterozygous plants (RW x RW) showing incomplete dominance?

Back

The expected phenotype ratio is 1 red (RR): 2 pink (RW): 1 white (WW).

Front

What is the definition of complete dominance?

Back

Complete dominance occurs when the phenotype of the heterozygote is completely indistinguishable from that of the dominant homozygote.

Front

If a red flowered plant (RR) is crossed with a white flowered plant (WW) and shows incomplete dominance, what will be the color of the offspring?

Back

All offspring will have pink flowers (RW).

Front

What is the genotype of a plant with curly hair in the hair form gene?

Back

The genotype of a plant with curly hair is CC, as it is recessive.