Cards (36)

    • Epistasis refers to a genetic interaction where the expression of one gene is modified by one or more other genes
    • In dominant epistasis, a homozygous recessive allele masks the effect of another gene.
      False
    • In dominant epistasis, what phenotypic ratio results from one or two copies of the dominant allele masking another gene's effect?
      12:3:1
    • Recessive epistasis occurs when a dominant allele masks the effect of another gene.
      False
    • In recessive epistasis, homozygous recessive alleles mask the effect of another gene
    • What is the role of modifier genes in epistasis?
      Affect phenotypic effect
    • In dominant epistasis, the hypostatic gene is the gene whose expression is masked.

      True
    • Match the type of epistasis with its definition:
      Dominant Epistasis ↔️ Dominant allele of one gene masks the other
      Recessive Epistasis ↔️ Homozygous recessive of one gene masks the other
      Duplicate Recessive Epistasis ↔️ Two genes' recessive alleles each mask the other
    • The epistatic gene is the gene whose expression is masked or modified.
      False
    • A hypostatic gene is one whose expression is masked or modified
    • In epistasis, genes interact
    • A hypostatic gene is masked or modified by the epistatic gene.
    • In dominant epistasis, the epistatic gene contains a dominant allele
    • Give an example of recessive epistasis.
      Homozygous cc in plants
    • In duplicate recessive epistasis, two genes each have a recessive allele that masks the effect of another gene.
    • In epistasis, multiple genes interact to determine a single phenotype.

      True
    • The phenotypic effect of one gene in epistasis depends on modifier genes.

      True
    • Recessive epistasis results in a phenotypic ratio of 9:3:4.
    • In Labrador retrievers, the E gene determines if coat color is expressed, an example of dominant epistasis.

      True
    • In dominant epistasis, the phenotypic ratio is 12:3:1
    • In recessive epistasis, the phenotypic ratio is 9:3:4
    • What is the phenotypic ratio in dominant epistasis when one or two copies of the dominant allele mask another gene?
      12:3:1
    • In epistasis, the phenotypic effect of one gene depends on the presence of modifier genes.

      True
    • In dominant epistasis, the epistatic gene is the dominant allele
    • What is the phenotypic ratio in dominant epistasis when the dominant allele masks the effect of another gene?
      12:3:1
    • In epistasis, multiple genes interact to determine a single phenotype
    • In dogs, what genotype of the E/e gene results in a yellow coat regardless of the B/b gene?
      ee
    • Epistasis refers to a genetic interaction where one gene modifies the expression of another gene.

      True
    • What is an epistatic gene?
      A gene that masks another
    • What is epistasis?
      Genetic interaction modifying expression
    • The phenotypic ratio in dominant epistasis is 12:3:1
    • In recessive epistasis, homozygous recessive alleles of one gene mask the effect of another gene.

      True
    • What is the phenotypic ratio in duplicate dominant epistasis?
      15:1
    • An epistatic gene masks or modifies the expression of a hypostatic gene.
    • In dominant epistasis, the phenotypic ratio is 12:3:1.
    • In which organism is complementary gene action observed for flower color?
      Snapdragons