Extranuclear inheritence is due to the presence of genes in
A
Mitochondria and chloroplasts
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B
Nulceus and mitochondria
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C
Nucleus and chloroplasts
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D
Endoplasmic reticulum and mitochondria
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Solution
The correct option is B Mitochondria and chloroplasts Chloroplasts and mitochondria are semi-autonomous cell-organelles possessing their own DNA and proteins. In animals an individual gets mitochondria and mitochondrial genes from its mother because the middle piece of a sperm that contains mitochondria does not enter the egg during fertilisation. This inheritance pattern of mitochondria genes is called uniparental inheritance or extra nuclear inheritance or maternal inheritance.
So, the correct answer is 'mitochondria and chloroplasts'.