Question

Genes located on mitochondrial DNA

(a) generally show maternal inheritance

(b) are always inherited from the male parent

(c) show biparental inheritance like the nuclear genes

(d) are not inherited

Answer 1

Correct option (a) generally show maternal inheritance

Explanation:

Mitochondria are found only in eukaryotic cells, they contain a single circular double stranded DNA molecule (mtDNA). Available evidences show that mitochondria of female parent are transferred to progeny during fertilisation.

Recent studies have shown that factors responsible for cytoplasmic male sterility are located in mitochondrial DNA