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andreyandreev [35.5K]
3 years ago
7

Help please I'm so confused

Biology
1 answer:
Sergio [31]3 years ago
5 0

Hi,

Attached is solution diagram. You can see that true breeding means both have same alleles for purple PP and white WW flowers.

They were crossed to produce hybrid plants that all had purple flowers PW because purple was the dominant trait.

However, upon self fertilization of those hybrid plants, both purple and white flower plants were produced in 3:1.

Hope it helps!

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When there is Hardy-Weinberg equilibrium like in this case of a single locus with two alleles denoted A and a with frequencies f(A) = p and f(a) = q, the expected genotype frequencies under random mating are f(AA) = p² for the AA homozygotes, f(aa) = q² for the aa homozygotes, and f(Aa) = 2pq for the heterozygotes. Let's put that A is dominant and a is recessive allele. In Hardy-Weinberg equilibrium we have:

p²+2*p*q+q²= 1     p+q=1      p=1-q

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