Dihybrid Cross MCQ

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

• In an experiment with drosophila eye colour purple/red and wing shape normal/vestigial you observe that offspring mainly have either purple vestigial trait or red normal trait. What is the expected parental trait?
  ক

  Purple long and Red long

  খ

  Red Vestigial and purple long

  গ

  Red vestigial and purple vestigial

  ঘ

  Purple vestigial and red vestigial
• What will be the dyhybrid ratio for a cross between HH TT with hh tt?
  ক

  1:2:1

  খ

  9:3:3:1

  গ

  All same

  ঘ

  3:1
• By crossing homozygous short purple flowering parent with a heterozygous tall purple flowering parent you get 41 tall progeny. What will be the expected number of short progenies?
  ক

  12

  খ

  42

  গ

  60

  ঘ

  80
• In an organism you observe that phenotypes of the progeny are as – 315 H/H R/R, 108 H/-r/r, 101 h/h R/-, 32 h/h r/r. This shows_____
  ক

  Linkage

  খ

  Lethal alleles

  গ

  Epistasis

  ঘ

  Normal ratio
• If you include more number of genes in the cross, a branched diagram will be easier to find progeny phenotype.
  ক

  True

  খ

  False
• If you have an organism with the genotype Pp HH rr Ww this can be used as a parent in test cross for________
  ক

  H locus

  খ

  R locus

  গ

  W locus

  ঘ

  P locus
• Considering a dihybrid cross, what is the probability of the progeny being heterozygous at both the alleles?
  ক

  1/16

  খ

  4/16

  গ

  7/16

  ঘ

  9/16
• If you cross homozygous recessive short plant with heterozygous purple flower to heterozygous tall plant with heterozygous purple flower, what will be the expected phenotypic ratio?
  ক

  9:3:3:1

  খ

  4:4:2:2

  গ

  3:1:3:1

  ঘ

  1:2:1:2:4:2:1:2:1
• Which of the following will be pure breeding for only one character?
  ক

  Hh Rr

  খ

  HH Rr

  গ

  HH RR

  ঘ

  hh rr
• The expected phenotypic ratio obtained by crossing the F1 generation in dihybrid cross would be?
  ক

  3:1

  খ

  1:2:1

  গ

  9:3:3:1

  ঘ

  1:2:1:2:4:2:1:2:1