Biology — Pedigree: X-linked recessive
An X-linked recessive trait passed through carrier mothers.
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title "X-linked recessive inheritance"
individual I1 sex male affected no gen 1
individual I2 sex female affected no carrier yes gen 1
mating I1 I2
individual II1 sex male affected yes gen 2 parents I1 I2
individual II2 sex female affected no carrier yes gen 2 parents I1 I2
individual II3 sex male affected no gen 2 parents I1 I2