In a certain population of garden peas, the alleles T for tall plants and t for...
In a certain population of garden peas, the alleles T for tall plants and t for short plants are found in frequencies of 0.70 (for T) and 0.30 (for t). If the population is in genetic equilibrium, what proportion of the progeny produced by matings of tall x tall is expected to be short?
Homework Answers
T, Tall is dominant over t, short
allele frequency of T is p = 0.7
allele frequency of t is q = 0.3
If the cross is heterozygous , Tt x Tt
| T | t | |
| T | TT | Tt |
| t | Tt | tt |
The proportion of progeny to be short (tt) is 1/4 = 0.25
If the cross is homozygous, TT x TT
Then the proportion of progeny to be short is 0
If the cross is TT x Tt, proportion of progeny to be short is zero
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