Rescue of sun sensitivity and premature aging by embryonic lethal Xpd alleles in compound heterozygote mice suggests new thinking about recessive disorders in humans (see Mitchell et al.). Depicted is an artistic representation of the two alleles (light and dark) with a young woman emerging from the dark, symbolizing the rescue effect.
Image Credit: Photo by L. Kallasvee and J. O. Andressoo. Model, Reet Aus
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