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Color-blindness is a sex-linked trait.
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- A boy, whose parents and grandparents had normal vision, is color-blind.
- What are the genotypes for his mother and his maternal grandparents? Show all work
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- A normal woman marries a man whose mother is colorblind. What is the probability of their children having color blindness? What percent is phenotypically normalIf a woman homozygous for color blindness has children with a man having normal vision, what would be the potential genotypes and phenotypes of her offspring?At least two pairs of genes control eye color. Both pairs influence the production of the pigment, melanin, but act independently. One pair of alleles is B (Brown color; dominant) and b (blue color); the other pair is A (pigment production; dominant) and a (no pigment production; albino). The gene pair aais epistatic to (masks) B and b and produces the nonpigmented eyes of the albino. What is the typeof gene interaction that exists between the two gene pairs? Give the genotypes and phenotypes of the possible offspring of the mating bbAa x Bbaa andi ndicate the parental phenotypes. (any method)
- With regard to the ABO blood types in humans, determine the genotypes of the individuals below: John: John is blood type A and his mom was type B Genotype = Jane: Jane is blood type B and her dad was type O Genotype John and Jane have kids. What are the possible blood types of their offspring, including the expected ratio of each? O John is A1", Jane is l'i, the blood type ratios of their children would be: 1 AB: 1A : 1B John is IA, Jane is l1", the blood type ratios of their children would be: 1 AB: 1 B John is 1Ai. Janc is iP1P, the blood typc ratios of their children would be: 1 AB: 1 A: 1B John is Jane is IPi, the blood type ratios of their children would be 1 AB : 1A 1B:10Colorblindness is an X linked gene. Normal vision (XN ) is dominant over colorblind (Xn). Cross a carrier female to a normal male. How many of their children will be colorblind? How many of their sons will be colorblind? How many of their daughters will be colorblind?In humans color vision is X-linked, the gene for color vision is located on the X chromosome but is absent on the Y chromosome. Normal color vision (XN) is dominant over colorblindness (Xn). Suppose a colorblind man fathers the children of a woman with genotype XNXN. What is the genotype of the father? What proportion of daughters will be colorblind? What proportion of the sons will be colorblind?
- Mary and Ron don't have albinism. However, is it possible for them to have a child with albinism? Explain. Stephanie has normal color vision. Her husband Chris also has normal color vision. They have a son that is color blind and a daughter that has normal color vision. What is the genotype of the mother, father, son and the daughter? Andy and Anne do not have polydactyl. Is it possible for them to have a child with polydactyl? Explain. When examining a pedigree chart, I notice that only males are affected. What does this tell me about the inheritance pattern? A man with blood type A marries a woman with blood type B. Their child has blood type O. What are the genotypes of the parents?Two normal visioned parents have a color-blind son. Give the genotype of both parents and the son.A young boy is color blind. His one brother and five sisters are not. The boy has three maternal uncles and four maternal aunts. None of his uncles’ children or grandchildren is colorblind. One of the maternal aunts married a colorblind man, and half of her children, both male and female, are colorblind. The other aunts married man who have normal color vision. All their daughters have normal vision, but half of their sons are color blind. a) is either of the boy’s parents colorblind? b) which of the boy’s four grandparents transmitted the gene for colorblindness?
- Colorblindness is a sex-linked traits in humans. If a normal-visioned mother and a colorblind father have 5 female offspring and 6 male offspring that are all NOT colorblind, what is likely the mother’s genotype? Why?A woman with a colorblind father marries a colorblind man. What would be all possible genotypes and phenotypes of their offspring?In humans, being right handed (R) is dominant over being left handed (r), and normal vision (X+) is dominant over color blindness (Xc). Color blindness is a X-linked (a.k.a sex linked) trait. Two right-handed parents with normal vision have a son who is color blind and left handed. What are the genotypes of the parents for right-handedness and color blindness?