London, United Kingdom
Genetics Of Colour Blindness, Diagram
Francis Leroy, Biocosmos
Photograph - Photograph
Genetics of colour blindness. Diagram showing the inheritance of colour-blindness genes. X-chromosomes (yellow) and Y-chromosomes (blue) combine at centre. The normal colour vision allele is a red bar, and the colour-blindness allele is a black bar. The male symbol (arrow) and female symbol (cross) show the male and female parents and the offspring (sons and daughters). The cross-table shows the probability for colour-blindness in the offspring of a carrier woman and normal man is a quarter each normal sons, colour-blind sons, normal daughters, and carrier daughters. This trait is thus classed as X-linked recessive. For an alternative combination, see C009/0292.
May 7th, 2013
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