Red-green color blindness is a sex-linked trait, with the normal vision phenotype being dominant (C) and...
Red-green color blindness is a sex-linked trait, with the normal vision phenotype being dominant (C) and the color blind (c) phenotype being recessive. If you are male and your father is color blind, what is the chance (expressed as a percentage) that you will inherit his trait for color blindness? What if your mother is a carrier for color blindness (but your father is not color blind), what is the chance of you being color blind? Make sure to explain your answers.
Homework Answers
colorblindness is a sex-linked recessive trait that is the gene is located on the X chromosome, and men inherit their X chromosome from mother, for a man to be affected with sickle cell anemia he has to have mutated c allele on his X chromosome, if his father is affected he cannot pass the X chromosome with mutated allele to his Sons, he passes Y chromosome to his sons so a male whose father is affected cannot be affected with the disease so the chance that a son will inherit the colorblindness of his father is 0
XC-dominant allele and Xc-mutated allele then
mother is XCXc and the father is XCY
XCXc * XCY
| XC | Xc | |
| XC | XCXC (normal female) | XCXc( carrier female) |
| Y | XCY (normal male) | XcY ( colorblind male) |
chance of getting a colorblind male= (number of colorblind
males/total number of male)
100=(1/2)100=50%
so chance that a male is affected if the mother a carrer=50%
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Red-green color blindness is a sex-linked trait, with the normal
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