An illustration of a sex-linked trait in man, diagrams of P, F1 and F2 phenotype and genotype contrast offspring of a normal mother and color-blind father with those of a normal father and a color-blind mother. Since alleles are coded on X-chromosomes only, there are no heterozygous males; characteristic 3:1 and 1:1 F2 phenotype ratios result. Size: 48" x 50", laminated.
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