What is the definition of epistasis?(1 point)

Question

Responses

when the allele of one gene interferes with the expression of another gene
when the allele of one gene interferes with the expression of another gene

when a dominant allele for a specific trait is not completely expressed over the recessive allele
when a dominant allele for a specific trait is not completely expressed over the recessive allele

when one gene affects multiple phenotypes
when one gene affects multiple phenotypes

when one trait is determined by multiple genes

Which is an example of codominance?(1 point)
Responses

tall and short plant heights
tall and short plant heights

black and yellow coat color in Labrador retrievers
black and yellow coat color in Labrador retrievers

seed shape in pea plants
seed shape in pea plants

black and brown spotted coat color in horses

Consider that a plant with genotype RR has red flowers and a plant with genotype WW has white flowers. This plant species expresses incomplete dominance for flower color when the plant is heterozygous.

The offspring of a cross between an RR plant and a WW plant would be

(1 point)
Responses

pink and white.
pink and white.

all white.
all white.

all pink.
all pink.

red and pink.
red and pink.

A genetic disease is found in a family that affects the immune system, lungs, heart, and kidneys. A DNA analysis of several affected and unaffected family members determines that the disease is caused by a mutation in a single gene. What type of inheritance pattern is shown in this disease?(1 point)
Responses

codominance
codominance

pleiotropy
pleiotropy

polygenic trait
polygenic trait

incomplete dominance

If a homozygous white horse CWCW and a homozygous black horse CBCB are bred together, what is the likelihood that their offspring will be roan with both colors represented in their hair if this gene follows a codominant inheritance pattern?(1 point)
Responses

0%
0%

50%
50%

100%
100%

25%

Answer 1

1. What is the definition of epistasis?
   Response: when the allele of one gene interferes with the expression of another gene

2. Which is an example of codominance?
   Response: black and yellow coat color in Labrador retrievers

3. The offspring of a cross between an RR plant and a WW plant would be
   Response: all pink.

4. What type of inheritance pattern is shown in this disease?
   Response: pleiotropy

5. What is the likelihood that their offspring will be roan with both colors represented in their hair?
   Response: 100%