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Heredity and Variation — Science STD 9 — Question

Maharashtra BoardEnglish MediumSTD 9ScienceHeredity and Variation3 Marks
Question
Mitochondrial disorders are inherited from the mother only.
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Answer

  • Mitochondrial DNA becomes defective due to mutation.
  • During fertilization, mitochondria are contributed by the egg cell (ovum) alone.
  • Hence, mitochondrial disorders are inherited from the mother only.

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