NEET UG BIOLOGY MCQ: EVOLUTION

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For the MN – blood group system, the frequencies of M and N alleles are 0.7 and 0.3, respectively. The expected frequency of MN – blood group bearing organisms is likely to be:

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Correct option: A

0.42

Option A (0.42) is correct because the expected frequency of the MN blood group is calculated using the Hardy-Weinberg principle: 2pq, where p=0.7 and q=0.3.

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The main point of Darwin’s theory is Which one of the following is not a vestigial structure in Homo sapiens? The brain capacities of Homo habilis were Assertion (A): In mammals the forelimbs perform different functions.

Reason (R): The forelimbs in different mammals consist of different sets of bones. Identify the phenomenon in which the members of a species do not interbreed with the members of other species or same species Assertion: Organic compounds first evolved in earth required for origin of life were protein and nucleic acid.
Reason: All life forms were in water environment only.