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Read Mitochondrial Inheritance
Mitochondria carry their own genome and are transmitted mainly through the egg cytoplasm.
NSEJS · Principles of Inheritance and Variation · 1 linked question · 100% coverage
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Cytoplasmic Inheritance is the central idea in this question pattern. Identify the condition in the stem before applying the method below.
Study deeper: NCERT Science · Principles of Inheritance and Variation
Follow the cytoplasm
The zygote receives almost all cytoplasm and mitochondria from the ovum, so mitochondrial DNA variants usually show maternal inheritance.
OlympIQ exam lens
- ✓Mitochondrial mutations are usually maternally inherited.
OlympIQ trap
Do not apply the usual nuclear 1:1 parental inheritance pattern to mitochondrial DNA.
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