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 calico cat shows both orange and black fur.

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 RW in incomplete dominance?

Back

The phenotype of a plant with genotype RW in incomplete dominance is pink flowers.

Front

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

Back

All offspring will have pink flowers (RW).

Front

In a cross between two wavy-haired parents (SC), 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 illustrate?

Back

A Punnett square illustrates the possible genetic combinations of offspring from a cross between two parents.

Front

What is the expected percentage of offspring with white fur if black (BB) and gray (BG) cats are crossed?

Back

0% of the offspring will have white fur.

Front

What is the difference between codominance and incomplete dominance?

Back

In codominance, both traits are fully expressed (e.g., calico cats), while in incomplete dominance, the traits blend to form an intermediate phenotype (e.g., pink flowers from red and white parents).

Front

What is the genotype of a cat that has both orange and black fur?

Back

The genotype of a calico cat is X^oX^b, where X^o represents the orange allele and X^b represents the black allele.

Front

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

Back

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