Red–green color blindness pedigree with X-linked genotypes

An example figure from the Pedigree generator.

A three-generation pedigree titled Red–green color blindness, with an affected grandfather, carrier daughters drawn with a center dot, two affected grandsons, and each person’s genotype written on X and Y with B or b as a superscript — A three-generation pedigree of 15 people. An affected grandfather, I-1, has two carrier daughters, II-2 and II-5, shown with a dot in the middle, and each has an affected son, III-1 and III-7; his son II-3 has unaffected children. Every person’s genotype is written on X and Y chromosomes with B and b as superscripts, and the key adds the carrier symbol.

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Answer key

X-linked recessive inheritance
I-1 XᵇY, I-2 XᴮXᴮ
II-1 XᴮY, II-2 XᴮXᵇ, II-3 XᴮY, II-4 XᴮXᴮ, II-5 XᴮXᵇ, II-6 XᴮY
III-1 XᵇY, III-2 XᴮY, III-3 XᴮXᵇ, III-4 XᴮY, III-5 XᴮXᴮ, III-6 XᴮXᴮ, III-7 XᵇY

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