Question

Extranuclear inheritance is a consequence of presence of genes in

• A. Lysosomes and ribosomes
• B. Mitochondria and chloroplasts
• C. Endoplasmic reticulum and mitochondria
• D. Ribosomes and chloroplast

Answer 1

Answer: (B)

Mitochondria and chloroplasts

DNA and RNA is the genetic material that carries information from one generation to another. Apart from this genetic material in the nucleus, the cytoplasm also contributes to the inheritance of some characters. Such characters are cytoplasmic inherited characters and this phenomenon is called as cytoplasmic inheritance. It is also called extra nuclear inheritance, because in this type of inheritance factors lies outside the nucleus of the cell. The cytoplasm contains various cell organelles including mitochondria, chloroplast are regarded as semi-autonomous as they contain their own genetic material-DNA. Hence cytoplasmic inheritance involves inheritance of mitochondrial DNA and/or chloroplast DNA.

So, the correct answer is 'Mitochondria and chloroplasts'.