Peas have a haploid number of seven chromosomes, so many of their genes are linked. What would Mendel's results have been if the genes for seed color and seed shape were linked with a map distance of 14 units?

Question

Biology

Madyson Munoz

10 October, 10:42

Peas have a haploid number of seven chromosomes, so many of their genes are linked. What would Mendel's results have been if the genes for seed color and seed shape were linked with a map distance of 14 units?

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Answers (1)

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Jags · Answer 1

14% recombinant, approximately 7% round green and 7% wrinkled yellow

Explanation:

Due to linkage, genes present on same chromosome show the tendency to get inherited together. In case of no linkage, recombinants and parental type gametes are produced in equal number but when linkage is present, parental gametes are produced more in number and recombinants are less in number.

Map distance = recombination frequency. Hence 14 map units = 14% recombination. In Mendel's experiments, parents were pure breeding round yellow and wrinkled green plants. Hence the two new recombinants would be round green and wrinkled yellow. Out of the 14% recombinants 7% would be round green and 7% would be wrinkled yellow.