Red/green colorblindness is due to a recessive X-linked allele, Xb. A colorblind man marries a woman with normal vision. Her parents have normal vision, but her grandfather on the maternal side is red/green colorblind. What is the probability they will have a son with normal color vision? Show your pedigree with genotypes, and relevant calculations using the product and sum rules Red/green colorblindness is due to a recessive X-linked allele, Xb. A colorblind man marries a woman with normal vision. Her parents have normal vision, but her grandfather on the maternal side is red/green colorblind. What is the probability they will have a son with normal color vision? Show your pedigree with genotypes, and relevant calculations using the product and sum rules.