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With sex linked traits (the allele is found on the X chromosome) males are either affected or not (they have the defective allele or they don't). Women have two copies of the allele and can be a carrier.

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15y ago
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11y ago

Because it travels on the X Chromozome. It has to 'infect' all of the Xs to affect the person. If it only affects one X on a woman (XX) then she will be able to pass it onto he child, but she will not be affected. It has to be all of the Xs. A man will be affected if he gets it, because there is only one X to infect (XY).

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13y ago

No. Men are XY. Colorblindness is carried on the X chromosome. Since the Y chromosome is much smaller, it does not carry all the same information as X. To be a carrier for a condition, you must have something to cover it up. A man can be colorblind or colorsighted, but he cannot carry colorblindness. Only women can.

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13y ago

colorblindness is a sex-linked disease. This means they are diseases affected by chromosomes on the X and Y chromosomes. Two chromosomes determine your sex. XX means you are a girl, XY means you are a boy. Colorblindness is located on the X chromosome. Since guys only have one X chromosome, they can either have colorblindness or not have it.

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12y ago

Color blindness is a gene expressed in the Y chromosome, which only males give during sexual reproduction.

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11y ago

Boys can't be carriers of colorblindness because if they have one allele for colorblindness it will show because they only have one X chromosome.

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13y ago

you look gay

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Q: Why can't boys be carriers of colorblindness?
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Not necessarily. The allele for colorblindness is recessive. For a female, in order to be colorblind she must have to recessive alleles for colorblindness. Example: XcXc would be colorblind. XCXc would be a carrier for colorblindness, but not colorblind. For a male, because colorblindness is a sex-linked gene, he only needs one allele to be colorblind. Example: XcY is colorblind. XCY is not colorblind.


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