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
jamb 1993biology

The correct answer is B. 1 homozygous smooth : 2 heterozygous smooth : 1 wrinkled

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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