Question 6

First define alleles:

S = smooth (the dominant trait)

s = peach (the recessive trait)

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Parental (P) Cross

Smooth x Peach

SS x ss

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F₁ Generation

All (100%) Smooth: Ss (100% heterozygous)

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F₂ Generation

Punnett Square Illustrating F₁ Generation Cross:

F₂ Generation Genotype Ratio:

SS : Ss : ss

1 : 2 : 1

F₂ Generation Phenotype Ratio:

Brown : Sliverblue

S_ : ss

3 : 1

Note: 520:174 = 2.99:1