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Red-green color blindness is an x-linked recessive condition in humans. a man with normal vision had 8 children with a women that had normal vision; 2 sons were color blind, 2 sons had normal vision, all four daughters had normal vision. what is the expected genotype of the mother? xby xbxb xbxb xbxb

Respuesta :

underV
1) recessive allele is b
    dominant allele is B
When an X chromosome contains the dominant allele,is written as: [tex]X^B[/tex]
When an X chromosome contains the recessive allele, is written as:[tex]X^b[/tex]

2) the genotype of the woman is [tex]X^BX^b[/tex] She is not color-blind but she is a carrier of red-green color blindness, who passed the allele to their sons.
Woman,  have two X chromosomes.  If she is not colorblind is because there is the dominant allele making her see normally. But, she is a carrier, so while one X chromosomes has the dominant allele, the other has the recessive (making her carry the disease).  

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