Heterozygous tall plants were crossed with pure-breeding dwarf plants of the same species. What were the approximate percentages of the offspring?

  • A 100% tall 0% dwarf
  • B 75% tall 25% dwarf
  • C 50% tall 50% dwarf
  • D 25% tall 75% dwarf
waec 2004biology

The correct answer is C. 50% tall 50% dwarf

A heterozygous tall plant (say Tt) crossed with pure-breeding dwarf plants (tt) will give a set of Tt, Tt, tt and tt. This is 50% tall and 50% dwarf approximately.

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