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Question
Two true-breeding varieties of garden peas are crossed. One parent had red, axial flowers, and the other had white, terminal flowers. All F1 individuals had red, terminal flowers. If 100F2 offsprings were counted, how many of them would you expect to have red, axial flowers?
Two true-breeding varieties of garden peas are crossed. One parent had red, axial flowers, and the other had white, terminal flowers. All F1 individuals had red, terminal flowers. If 100F2 offsprings were counted, how many of them would you expect to have red, axial flowers?
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Solution
The correct option is B 56
The F1 individuals are heterozygous is nature with red and terminal flowers. As it is a dihybrid cross, the F2 generation, will have offsprings in the ratio of 9:3:3:1. The dominant phenotypes are in the frequency 9/16. So the total number of such offsprings are (9/16)*100=56.25~56.
So the correct option is '56'.
The F1 individuals are heterozygous is nature with red and terminal flowers. As it is a dihybrid cross, the F2 generation, will have offsprings in the ratio of 9:3:3:1. The dominant phenotypes are in the frequency 9/16. So the total number of such offsprings are (9/16)*100=56.25~56.
So the correct option is '56'.
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