Epistasis MCQ

Test your knowledge with important Epistasis MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Epistasis MCQs at Bissoy

• In case of summer squash which of the following is not right.
  ক

  The W allele produces a White substance

  খ

  A white substance is converted to Yellow when dominant Y allele is present

  গ

  The transformation of white substance to yellow is via green intermediate

  ঘ

  The green intermediate has combination at the Y locus y/y
• In case of summer squash, the W locus shows dominant epistasis over the Y locus. W locus develop white colour while /- give yellow and y/y gives green. If you cross a yellow and a green summer squash you can’t get______________
  ক

  Yellow

  খ

  Green

  গ

  White

  ঘ

  You can get all
• Which of the following is incorrect about the graying of coat colour of horse?
  ক

  The graying is a case of dominant epistasis

  খ

  The colour of the fur and skin gradually turns grey

  গ

  The G/G or G/g shows greying

  ঘ

  Coat colour of horse with G/- combination will grey irrespective of what was its colour to start with
• Which one of the following is not the case of epistasis?
  ক

  Fur colour in mouse

  খ

  Fruit colour in summer squash

  গ

  Fruit shape in summer squash

  ঘ

  Coat colour in labrador
• Dominant epistasis ratio with A as epistatic gene 12:3:1 corresponds to ________________
  ক

  A/- B/- : A/- b/b : a/a B/-

  খ

  a/a B/- : a/a b/b : a/a b/-

  গ

  A/A B/-: A/- B/-: a/a b/b

  ঘ

  A/- -/- : a/a B/-: a/a b/b
• In case of dominant epistasis which of the following will have the same expression, when A is the epistatic locus?
  ক

  A/a B/b and a/a B/b

  খ

  A/A b/b and A/A B/b

  গ

  a/a b/b and A/a b/b

  ঘ

  a/a b/b and a/a B/B
• Epistasis can produce a ratio of 12:3:1.
  ক

  True

  খ

  False
• Coat colour in Labrador retriever is controlled by epistasis. B specifies black pigment, b is for brown pigment (recessive) and E locus determines the expression of B locus. Which one of the following is wrong?
  ক

  bb EE gives yellow

  খ

  Bb EE gives black

  গ

  bb Ee gives brown

  ঘ

  BB EE gives black
• Which one of the following has dominant allele in both gene locus?
  ক

  Black

  খ

  Albino

  গ

  Agouti

  ঘ

  White
• The cross between a white mouse and a black mouse _______________
  ক

  Can’t give a Black mouse

  খ

  Can’t give a White mouse

  গ

  Can’t give a Agouti mouse

  ঘ

  Can give all combinations
• In mouse agouti locus is hypostatic to pigment development locus. If C is for pigment development, and A is for agouti, and recessive alleles in agouti locus gives black colour and recessive in pigment locus gives white colour, what will be the phenotype of A/- c/c and a/a c/c.
  ক

  Agouti, white

  খ

  Black, agouti

  গ

  Black, black

  ঘ

  White, white
• What is the dihybrid phenotypic ratio for recessive epistasis in an F22 generation?
  ক

  9:3:3:1

  খ

  9:6:1

  গ

  9:3:4:1

  ঘ

  9:3:4
• Epistasis is the interaction between two genes producing a new phenotype.
  ক

  True

  খ

  False
• Epistasis is the interaction between_____________ genes.
  ক

  2

  খ

  4

  গ

  8

  ঘ

  16
• In case of two gene interaction, the gene which is masking the expression of another is called_____________ and the gene whose expression is masked is called_______________
  ক

  Dominant, recessive

  খ

  Recessive, dominant

  গ

  Epistatic, hypostatic

  ঘ

  Hypostatic, Epistatic