السؤال 59

A Punnett square has BB written in one top margin cell and Bb in the other. Why is this wrong?

Because the margin cells should hold the phenotypes of the offspring
Because both margin cells must contain the same symbols
Because the margins hold gametes, and a gamete carries one alleleالإجابة الصحيحة
Because a parent can only have one genotype at a time

الشرح

Each margin cell stands for one gamete, and a gamete receives just one of the two alleles a parent holds, so a two-letter entry there describes a body cell instead. Placing offspring information in the margins turns the diagram around, because that information is the result the boxes are meant to produce.

الشرح

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