Color blindness Punnett square: X-linked cross of a carrier mother

An example figure from the Punnett Square generator.

An X-linked Punnett square crossing ♀ XᴮXᵇ × ♂ XᴮY, with gametes Xᴮ and Xᵇ across the top and Xᴮ and Y down the side, offspring XᴮXᴮ, XᴮXᵇ, XᴮY and XᵇY, the color-blind cell shaded gray, and percentages for genotypes, daughters and sons below — An X-linked Punnett square for red-green color blindness: a carrier mother, ♀ XᴮXᵇ, across the top and a father with normal vision, ♂ XᴮY, down the side. The cells hold two daughters, XᴮXᴮ and XᴮXᵇ, and two sons, XᴮY and XᵇY, with the color-blind cell shaded gray and a key. Under the square the genotypes are given as percentages, then the phenotypes separately for daughters and for sons.

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Answer key

Genotypes: 25% XᴮXᴮ, 25% XᴮXᵇ, 25% XᴮY, 25% XᵇY
Daughters: 100% normal vision
Sons: 50% normal vision, 50% color-blind

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