Chicken Genetics (Codominance) Gizmo

What is the genotype of this chicken?

• red & white

• RR

• Rr

• RW

The two chickens below are bred together. Which of the following is a possible set of offspring for these parents?

• One red chicken, one white chicken, and three red/white chickens.

• Three red chickens and two white chickens.

• Five red/white chickens.

• All of these are possible

Two chickens are bred and have five offspring, shown below. What are the most likely genotypes of the parents?

• RW x RW

• RR x WW

• RW x RR

• RW x WW

Two chickens are bred and produce the following numbers of offspring. What are the most likely phenotypes of the parents?

• Both parents have red/white feathers.

• Both parents have white feathers.

• One parent has white feathers, and one parent has red/white feathers.

• One parent has white feathers, and one parent has red feathers.

What are the most likely percentages for offspring of two red/white-feather parents?

• 100% red/white-feather chickens.

• 50% white-feather chickens and 50% red/white-feather chickens.

• 33% white-feather chickens, 33% red-feather chickens, and 33% red/white-feather chickens.

• 25% white-feather chickens, 25% red-feather chickens, and 50% red/white-feather chickens.

How is codominance different from regular Mendelian genetics?

• Mendelian genetics only has 2 phenotypes and codominance has up to 3 phenotypes

• Mendelian genetics has dominant and recessive alleles but codominance has 2 dominant alleles

• Mendelian genetics uses capital and lower case letters and codominance uses capital letters

• all of these are correct