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Suppose Jonathan breeds flowers and wants to optimize production of offspring with both short stems and...

Suppose Jonathan breeds flowers and wants to optimize production of offspring with both short stems and white flowers, which are coded for by two genes with the recessive alleles t and p, respectively. In flowers, T codes for tall stems and P codes for purple flowers. Jonathan crosses two heterozygotes that produce 544 offspring. How many of these 544 offspring are predicted to have both short stems and white flowers?

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Answer:

TtPp x TtPp ----Parents

Tt x Tt = T_ (tall-3/4) & tt (short-1/4)

Pp x Pp = P_(purple-3/4) & pp (white-1/4)

The proportion of short stems and white flowers = ttpp = ¼*1/4= 1/16

Number of short stems and white flowers plants produced out of 544 = 1/16*544 = 34

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