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JAMB Biology 1993 Question 48

Question 48

Mendelian Inheritance

In the illustration above, the genotypes of the offsprings are

Diagram for this question
  1. A.1 heterozygous smooth : 2 homozygous smooth : 1 wrinkled
  2. B.1 homozygous smooth : 2 heterozygous smooth : 1 wrinkled
  3. C.2 homozygous smooth : 2 wrinkled
  4. D.3 heterozygous smooth : 1 wrinkled.
Show the answer and explanation

Answer: B (1 homozygous smooth : 2 heterozygous smooth : 1 wrinkled)

Explanation

The square gives SS, Ss, sS and ss: one homozygous smooth, two heterozygous smooth (Ss) and one wrinkled (ss).