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NEET2001ZoologyPrinciples of Inheritance and VariationActual

Extranuclear genes occurs in

Options

  1. Aplastids and are not inherited
  2. Bplasmid and are not inherited
  3. Cmitochondria and are inherited by female
  4. Dmitochondria and are inherited by male.

Correct answer

C. mitochondria and are inherited by female

Step-by-step solution

Cytoplasmic inheritance or non chromosomal (extranuclear) inheritance is the passage of traits from parents to offspring through structures present inside cytoplasm of contributing gametes. The genes controlling cytoplasmic inheritance are called plasma genes or extra nuclear genes. These occur in plastids, mitochondria, plasmids. Cytoplasmic inheritance is usually uniparental. It is also called maternal inheritance as zygote receives its cytoplasm from ovum.

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