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Will my baby grow up to be color blind?The gene that distinguishes between red and green are on the X-chromosomes. There are no color vision genes on Y-Chromosomes. Therefore, color blindness is called as 'X-linked' trait. A female with one defective and one normal X-chromosome has normal vision. A male with a defective color vision gene on his X-chromosome, is colorblind. There are no genes for normal color vision on the Y-chromosome to cover for the defective X-chromosome.
1. Father: No Color blind defect, Mother: 'one defective and one normal' Male off spring: Color blind 2. Father: Color blind defect, Mother: No Color Blind defect Male off spring: No color blind defect Female off spring: 'one defective and one normal' |
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