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Biology 1991 JAMB Past Questions

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31
Epigeal germination can be found in
  • A. sorghum
  • B. maize
  • C. millet
  • D. groundnut
View Answer & Discuss (13) JAMB 1991
32
A dwarf plant can be stimulated to grow to normal height by the application of
  • A. thyroxin
  • B. gibberellin
  • C. insulin
  • D. kinin
View Answer & Discuss JAMB 1991
33
The greatest contribution to genetic studies was made by
  • A. Thomas Morgan
  • B. Gregor Mendel
  • C. Charles Darwin
  • D. Robert Hooke
View Answer & Discuss (2) JAMB 1991
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34
The exchange of genes between homologous chromosomes is called
  • A. test cross
  • B. back cross
  • C. crossing-over
  • D. mutation
View Answer & Discuss (8) JAMB 1991
35

When two heterozygotes mate, the dominant trait will appear in

  • A. the F1 generation only
  • B. the F2 generation only
  • C. both the F1 and F2 generations
  • D. neither the F1 nor F2 generation
View Answer & Discuss (7) JAMB 1991
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