ANSWERS: 1
  • The r gene and the y gene can each come from either mum or dad. Suppose mum = RrYy and dad = rryy. The four possibilities from your given answer all from mum: RrYy all from dad: rryy Rr from mum and yy from dad: Rryy rr from dad and Yy from mum: rrYy And they're all different, so 1:1:1:1 Oh, by the way I suspect y here stands for YELLOW meaning an arbitrary property. It doesn't mean the y chromosome.

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