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Sunday, 18 October 2026
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Biology Past Questions and Answers

Jamb 2003 Biology Questions

Question 36:
The pioneer organisms in ecological succession are usually the
  • A Mosses
  • B Lichens
  • C Ferns
  • D Algae
View Answer & Explanation
Question 37:
If a DNA strand has a base sequence TCA, its complementary strand must be
  • A ATG
  • B TAG
  • C GAT
  • D AGT
View Answer & Explanation
Question 38:
A man and his wife are both heterozyous for the sickle-cell trait. The likely percentage of their offspring that will be either carriers or sicklers is
  • A 75%
  • B 50%
  • C 25%
  • D 100%
View Answer & Explanation
Question 39:
If the pair of alleles for baldness is given as Bb, a female carrier will be denoted by
  • A X<sup style='font-size: smaller;'>b</sup>Y<sup style='font-size: smaller;'>B</sup>
  • B X<sup style='font-size: smaller;'>B</sup>X<sup style='font-size: smaller;'>B</sup>
  • C X<sup style='font-size: smaller;'>B</sup>Y
  • D X<sup style='font-size: smaller;'>Bb</sup>X<sup style='font-size: smaller;'>b</sup>
View Answer & Explanation
Question 40:
An organism that has been extensively used to test the chromosomes theory of heredity is
  • A Drosophila melanogaster
  • B Muscar domestica
  • C Zea mays
  • D Homo sapiens
View Answer & Explanation