Chromosome Abnormalities and Non-Mendelian Inheritance Video Lessons

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Problem: Males have a higher likelihood of being colorblind due to the condition being X-linked, and their only having one possible copy of that gene. Females, on the other hand, are XX and thus have two alleles for that gene, so that they are less likely to be affected However, some females can still be affected if they are heterozygous for the trait. Why would this occur?

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Males have a higher likelihood of being colorblind due to the condition being X-linked, and their only having one possible copy of that gene. Females, on the other hand, are XX and thus have two alleles for that gene, so that they are less likely to be affected However, some females can still be affected if they are heterozygous for the trait. Why would this occur?

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