Class 12 NEET Biology Biotechnology Principles and Processes

(b) : Sequence of both mt DNA and Y chromosomes are considered for the study of human evolution because they are uniparental in origin. mt DNA is inherited along with the maternal cytoplasm and Y chromosome is inherited from father. So they do not take part in recombination. In addition, mt DNA has a higher mutation rate then nuclear DNA so that it is more useful for short term evolutionary studies.