What is the definition of epistasis? (1 point)
when the allele of one gene masks the genotype of
another gene
when the allele of a gene changes the phenotype of another allele of that gene
when the allele of one gene masks the phenotype of another gene
when the allele of one gene changes the phenotype of another gene
The definition of epistasis is when the allele of one gene masks the phenotype of another gene.
In humans, dimples are a dominant trait. Predict the percentage of children that will have dimples if one parent is heterozygous for dimples and the other parent does not have dimples. (1 point)
50 percent 0 percent 100 percent 25 percent
The predicted percentage of children that will have dimples if one parent is heterozygous for dimples and the other parent does not have dimples is 50 percent.
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)
pink and white. red and pink. all pink.
all white.
The offspring of a cross between an RR plant and a WW plant in a species that exhibits incomplete dominance for flower color would be all pink.
If a homozygous white horse and a homozygous black horse are bred together, what percentage of the offspring will be roan and express both colors in their hair? (1 point)
25 percent 100 percent 50 percent 0 percent
If a homozygous white horse and a homozygous black horse are bred together, the percentage of the offspring that will be roan and express both colors in their hair would be 100 percent.
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 codominance pleiotropy
polygenic trait