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Friday, 17 April 2026
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Biology Past Questions and Answers

Jamb 1992 Biology Questions

Question 41:
Which of the following is true of the children of a heamophilic man who marries a woman that is not haemophilic and does not carry the trait?
  • A All their sons will be haemophlic
  • B All their daughters will be haemophilic
  • C All their daughters will be carriers
  • D All their sons will be carriers
View Answer & Explanation
Question 42:
A child with blood group genotype different from those of both parents and with a mother of genotype OO, can only have a father of genotype
  • A A
  • B B
  • C AB
  • D OO
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Question 43:
If R and r, denotes the genes for a character, the offspring of the cross between RR and Rr are
  • A RR, 2Rr, rr
  • B 2RR, 2rr, 2rr
  • C 2RR, 2Rr
  • D 4Rr
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Question 44:
A mammal with red fur and long ears was crossed with another having white fur and short ears. If the offspring had a red fur and short ears, the
  • A Character are linked
  • B Character are not linked
  • C Parents are related
  • D Parents are not related
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Question 45:
Pawpaw seeds collected from a tree with many desirable agronomic qualities did not give rise to plants of desirable character as the parent because
  • A Seeds are not reliable for propagating plants
  • B Uncontrolled out-crossing can introduced unwanted variability
  • C Vegetative propagation is best form of reproduction of all crop
  • D Seeds were not physiologically mature at the harvest
View Answer & Explanation