2. What is the genotype of a female who is not color-blind but is a carrier of red-green color blindness?
Part 4: Sex-Linked Inheritance—Predicting Color Blindness in Offspring
Recall that females have two X chromosomes: one from the mother and one from the father. Males have one X chromosome and one Y chromosome; the X chromosome comes from the mother, and the Y chromosome comes from the father. Traits associated with genes located on the sex chromosomes are called sex-linked traits.
Individuals with the sex-linked condition called red-green color blindness do not perceive the colors red and green. Red-green color blindness is caused by the recessive allele c and is carried on the X chromosome. The dominant allele for normal color vision is C. When an X chromosome contains the dominant allele, the allele is written as XC. When an X chromosome contains the recessive allele, the allele is written as Xc.
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Part 4: Sex-Linked Inheritance—Predicting Color Blindness in Offspring
Recall that females have two X chromosomes: one from the mother and one from the father. Males have one X chromosome and one Y chromosome; the X chromosome comes from the mother, and the Y chromosome comes from the father. Traits associated with genes located on the sex chromosomes are called sex-linked traits.
Individuals with the sex-linked condition called red-green color blindness do not perceive the colors red and green. Red-green color blindness is caused by the recessive allele c and is carried on the X chromosome. The dominant allele for normal color vision is C. When an X chromosome contains the dominant allele, the allele is written as XC. When an X chromosome contains the recessive allele, the allele is written as Xc.
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1 Answer
XCXc
Explanation:
XX because she is female. Since she is not color blind one of the pair has to be XC. Since she is a carrier of color blindness she has to have the recessive gene as well, so the other has to be Xc.
