Question

Mitochondrial DNA (mtDNA) is exclusively inherited from the mother. Because of its unique inheritance pattern, how can it be helpful to genetic researchers? A. It helps scientists better understand genetic conditions such as male pattern baldness and colorblindness. B. It provides insight into sex-linked traits that are passed through the X chromosome. C. It allows scientists to trace maternal lineages back many generations and show evolutionary relationships. D. It opens the possibility of asexual reproduction in organisms that previously reproduced sexually.

Answer 1

ot Ans. A It helps Scientists better understand genera conditions such as Male pattern Baldness and Colour blindness. The · Sex- limited traiit is an extreme example g. how The Expression a gene can be controlled by hormone In other less extreme cases q sex controlled charactombre only the dominance relation the two alleles is affected Characteristics g. This tupe are known as sex- influenced traiit cor sex - conditioned.) In which an allele Allele ºs dominent in one gen der but rolessive in the opposito gencles. The gene that causes patton baldness is Pingented at an autosomal trait q