A Mode of inheritance where the gene is in a non-sex chromosome (an autosome).

Autosomal dominant inheritance

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Rules

• about 50% of offspring affected
• affects male and female equally
• unaffected never transmit
• never "skips" a generation for Heterozygotes
• 100% of offspring affected for Homozygotes

Autosomal recesive inheritance

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Rules

• If parents are Heterozygotes, 1/4 of the offspring affected.
• Not present in every generation (can "skip" generations)
• Parents usually unaffected
• If an affected marries a carrier, half the kids are affected.

Population genetics calculation