Gene Interactions

Question 1

____ refers to when 2 pairs of genes determine the same phenotype but are assorted independently, producing new phenotypes by mutual genetic interaction.

Answer 1

Non-epistatic Inter-allelic Genetic Interaction

Question 2

___ refers to when a homozygous recessive genotype at one locus masks the expression at the second locus.

Answer 2

Recessive Epistasis

Question 3

____ refers to when a dominant allele at one locus masks the expression at the second locus.

Answer 3

Dominant Epistasis

Question 4

___ refers to when one gene when dominant, is
epistatic to the other, and the second gene when homozygous recessive, is epistatic to the first.

Answer 4

Dominant Suppression

Question 5

___ refers to when at least one dominant allele from
each of two genes is needed for a phenotype.

Answer 5

Complementary Gene Action

Question 6

____ refers to when one dominant allele from either of the two genes are needed for a phenotype.

Answer 6

Duplicate Dominant Epistasis

Question 7

___ refers to when two independent dominant genes have a similar phenotypic effect when present individually but produce a cumulative or double effect when found together.

Answer 7

Dominant Gene Interaction

Question 8

___ refers to when each genotype results in a unique
phenotype but there is a trend in that there are dominance relationships involving the phenotypes. (the highest number usually are the most dominant; the lowest is the most recessive).

Answer 8

Duplicate Genes with Additive Effect