Red green color blindness is a recessive sex linked trait. a colorblind male marries a normal color vision female. their daughter is colorblind. what are the genotypes of both parents and the daughter for this trait, in words.
In this scenario, red green color blindness is a recessive trait that is located on the sex chromosomes, specifically the X chromosome. Let's break down the genotypes of the parents and their daughter:
1. Father (colorblind male): The father is affected by red green color blindness, which is a recessive trait. Since he is colorblind, he must carry two recessive alleles for this trait. Therefore, his genotype is represented as "XcY" (Xc for the colorblind allele on his X chromosome and Y for the Y chromosome).
2. Mother (normal color vision female): The mother has normal color vision, which indicates that she does not carry the colorblind allele. Since she is unaffected by color blindness, she does not carry any copies of the recessive allele. Therefore, her genotype is represented as "XNXN" (XN for the normal allele on both her X chromosomes).
3. Daughter (colorblind): The daughter is colorblind, which means she has inherited the recessive colorblind allele from her father. She received one X chromosome from each parent. Since the father only has the colorblind allele to pass on, the daughter's genotype is "XcXN" (Xc for the colorblind allele on the X chromosome from the father and XN for the normal allele on the X chromosome from the mother).
Summary:
Father's genotype: XcY
Mother's genotype: XNXN
Daughter's genotype: XcXN