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In the illustration above, the genotypes of the offsprings are

Biology
JAMB 1993

In the illustration above, the genotypes of the offsprings are

  • A. 1 heterozygous smooth : 2 homozygous smooth : 1 wrinkled
  • B. 1 homozygous smooth : 2 heterozygous smooth : 1 wrinkled
  • C. 2 homozygous smooth : 2 wrinkled
  • D. 3 heterozygous smooth : 2 wrinkled
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Correct Answer: Option B
Explanation

The diagram above refers to a PUNNETT SQUARE used in predicting the probable genotypic and phenotypic ratios of a cross. looking at the diagram, we have the ratio

SS : Ss : sS : ss and from the question, we see the genotypic composition is;

1 homozygous smooth : 2 heterozygous smooth : 1 wrinkled

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