Evolution Question 53
53. In recent years, DNA sequences (nucleotide sequence) of mt-DNA and Y chromosomes were considered for the study of human evolution, because
[2003]
(a) they can be studied from the samples of fossil remains
(b) they are small, and therefore, easy to study
(c) they are uniparental in origin and do not take part in recombination
(d) their structure is known in greater detail
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Answer : c
Hints & Solution
(c) The human $Y$ chromosome is intriguing not only because it harbours the master-switch gene determining gender but also because of its unusual evolutionary trajectory. Previously an autosome, Y chromosome evolution has been characterized by massive gene decay.
