CELL DIVISION
MEIOSIS AND GENETIC VARIATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Gene A, B, and C are on the same chromosome. Gene A separates from gene B 15% of the time and gene B separates from gene C 2% of the time. Which genes are most likely linked?
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A-B
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B-C
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A-C
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none of the above
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Explanation:
Detailed explanation-1: -The genetic distance between genes A and B is 10 cm as given. Therefore, the recombination frequency is 10%. If the cross happens between two parents having genotype Ab and aB, their progeny, 10% will be formed of recombinant type (that is AB and ab) and 90% will be formed parental type (that is aB and Ab).
Detailed explanation-2: -The cross over frequencies between the genes A and B, A and C, and B and C is 6%, 15% and 21% respectively.
Detailed explanation-3: -Unlinked genes may be on different chromosomes, or so far apart on the same chromosome that they are often separated by recombination.
Detailed explanation-4: -Recombination frequency between gene A and B is 10 % and between B and C is 20 % .
There is 1 question to complete.