Extranuclear inheritance occurs in

Options

A. killer strain in Paramecium
B. colour blindness
C. phenylketonuria
D. Tay Sachs disease

Answer

A

Explanation

(a) Paramecium exhibits cytoplasmic inheritance due to he presence of Kappa paricles (self replicating bodies that produce toxin called paramecin). Besides binary fission and conjugation other reproductive processes that occurs in Paramecuim are autogamy, endomixis and cytogamy. Tay Sachs disease It is a rare autosomal recessive genetic disorder. Colour blindness It is X-chromosome related disease. So, it is a sex-linked disease. PKU autosomal recessive genetic disorder characterised by homozygous or compound heterozyous mutation in the gene.