| Mendel conducted a number of crosses and studies but could never discover linkage. What could be the reason for this? |
| I. Some genes are linked but they are too far apart for crossing over to be distinguished from independent assortment. |
| II. Linked genes were never tested for the same time in same cross. |
| III. The seven genes were present on the 7 chromosomes. |
| IV. The genes underwent mutations during subsequent crossings. |
| Choose the correct option. |
A) I and II
B) II and III
C) III and IV
D) Only lV
Correct Answer: A
Solution :
[a] Statements I and II are correct while III and IV are incorrect. Mendel could not find out linkage because all of his experimental characters of pea were not linked. They were present far apart from each other on four different chromosomes. Thus, option [a] is correct.
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