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GCE Biology 1990 Question 52

Question 52

Mendelian Inheritance

When gametes from pure breeding parents with contrasting features such as tallness and shortness are involved in monohybrid cross, the offspring in the first filial generation are usually

  1. A.pure breed
  2. B.heterozygous dominant
  3. C.homozygous recessive
  4. D.mutants
  5. E.co-dominant
Show the answer and explanation

Answer: B (heterozygous dominant)

Explanation

TT × tt gives all Tt: heterozygous and showing the dominant character.