A) What is the definition of epistasis? (1 point)
when a dominant allele for a specific trait is not completely expressed over the recessive allele
when one trait is determined by multiple genes
when one gene affects multiple phenotypes
when the allele of one gene interferes with the expression of another gene
C) 50%
A) Which is an example of codominance? (1 point)
black and brown spotted coat color in horses
tall and short plant heights
black and yellow coat color in Labrador retrievers
seed shape in pea plants
A)
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)
red and pink.
all white.
all pink.
pink and white
A) 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)
incomplete dominance
polygenic trait
codominance
pleiotropy
A) If a homozygous white horse C C and a homozygous black horse C C 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)
W W B B
100%
0%
50%
25%