What should be the order of genes (A, B and C) in a chromosome when the map distance between genes are as follows:
i. A and B = 3 units
ii. B and C = 10 units
iii. C and A = 7 units

B, A, C

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A, B, C

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B, C, A

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A, C, B

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Solution

The correct option is A B, A, C
Considering the arrangement of genes A, B, C in the patterns below:
Case I

Case II

Case III

Case IV

By observing the above diagrams it is clear that Case I represents the correct arrangement of genes on chromosomes as given in the question. Hence, option a is the correct answer.

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What should be the order of genes (A, B and C) in a chromosome when the map distance between genes are as follows: i. A and B = 3 units ii. B and C = 10 units iii. C and A = 7 units

What should be the order of genes (A, B and C) in a chromosome when the map distance between genes are as follows:
i. A and B = 3 units
ii. B and C = 10 units
iii. C and A = 7 units