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22 November, 05:54

Red-green color blindness is caused by an x-linked recessive gen. In a family, the mother is a carrier of this gene while the father does not have the gene. What are the possible effects on their children?

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  1. 22 November, 08:36
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    Half of the boys are color-blind and half of the girls are color-blind.
  2. 22 November, 09:36
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    I agree that half the boys would be colorblind but half the girls would only be carriers. Since girls sex genes are XX, and the father only has one X to "give" and that X doesn't code for the gene, only half could possibly be a carrier (getting a carrier X from the mother and a regular X from the father) while the other half would be normal.
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