Extranuclear inheritance is due to the presence of genes(DNA) ina)mitochondria and chloroplastsb)nucleus and mitochondriac)nuclesus and chloroplastsd)endoplasmic reticulum and mitochondriaCorrect answer is option 'A'. Can you explain this answer?

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Extranuclear inheritance is due to the presence of genes(DNA) in

a)
mitochondria and chloroplasts
b)
nucleus and mitochondria
c)
nuclesus and chloroplasts
d)
endoplasmic reticulum and mitochondria

Correct answer is option 'A'. Can you explain this answer?

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Extranuclear inheritance is due to the presence of genes(DNA) ina)mito...

Extranuclear inheritance refers to the transmission of genes that exist outside the cell nucleus.
The primary organelles involved are mitochondria and chloroplasts, both of which contain their own DNA.
Mitochondria are inherited maternally since sperm contribute little to the embryo's mitochondria during fertilization.
This type of inheritance is crucial for understanding traits that are passed down through maternal lineage.
Nuclear inheritance

Involves passing on genetic information from parents to offspring through nuclear chromosomes. This is the type of inheritance that is usually referred to when the term "heredity" is used.
Extranuclear inheritance

Also known as cytoplasmic inheritance, this involves passing on genes from outside the nucleus of a cell. These genes are usually found in organelles like mitochondria and chloroplasts, or from cellular parasites like bacteria or viruses.

Topic in NCERT: Mitochondria and Chloroplast

Line in NCERT: Mitochondria : The matrix also possesses single circular DNA molecule, a few RNA molecules, ribosomes (70S) and the components required for the synthesis of proteins. The mitochondria divide by fission.

Chloroplast:The stroma of the chloroplast contains enzymes required for the synthesis of carbohydrates and proteins. It also contains small, doublestranded circular DNA molecules and ribosomes

Answered by Sushil Kumar · View profile

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Extranuclear inheritance is due to the presence of genes(DNA) ina)mitochondria and chloroplastsb)nucleus and mitochondriac)nuclesus and chloroplastsd)endoplasmic reticulum and mitochondriaCorrect answer is option 'A'. Can you explain this answer?

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