In recent years, DNA sequences (nucleotide sequence) of mt - DNA and Y chromosomes were considered for the study of human evolution, because :

They are small, and therefore, easy to study

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They are uniparental in origin and do not take part in recombination

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Their structure is known in greater detail

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They can be studied from the samples of fossil remains

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Solution

The correct option is B They are uniparental in origin and do not take part in recombination
Phylogenies of the maternally inherited mtDNA genome and the paternally inherited portion of the nonrecombining Y chromosome retain sequential records of the accumulation of genetic diversity. And hence they are considered for the study of human evolution.

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