Baldness Genotype

anyone can help me with these genetic problems?

1. "Bent" a kind of X-linked dominant in mice results in a short tail twisted, its recessive allele provides normal tail. If a normal female tail is paired with a curved tail man, what are the phenotypes and genotypes of P.? 2. A colorblind man marries a woman with normal vision whose father is color blind a.) What is the probability that his son be colorblind? normal? b.) what is the probability that their daughters are colorblind? be normal or a company? 3.) A man marries a woman heterozygousfor baldness is normal, but has a stroke. What are the phenotypes and genotypes of your child? girls?

1. parental genotypes: bb curve normal father of the mother B / – has a single allele, as it is Offspring XB on chromosome each child – whether normal queue all the girls also have bent phenotype Bb. 2. Color blind genotype / – imagined mother like her normal CC genotype must have inherited the allele for color blindness of his father who passed on their X chromosome to her. Offspring child has a 50% chance of having normal vision and 50% to be color-blind according to the allele inherited from his mother. The father of a Y chromosome passes for themselves and the gentleman who have color blindness. daughters inherit all the C allele of her father to step in their X chromosome to their daughters. They have a 50% probability of being DC and DC 50% chance of being based on the allele inherited from his mother. CC and CC genotype is colorblind vision normal color and be carriers of the allele for color blindness. 3. There are some things missing in this so it is difficult to answer correctly. One man suggested that heterozygous you speak of an autosomal gene, but as far as I know, the baldness is usually linked to sex (X or Y) that makes men heterozygosity impossible. Secondly, baldness inherited more is expressed only in males. If you ignore it and have an autosomal mode of inheritance of baldness is recessive (as the mother is normal and a company), then: the mother of Bb and bb genotypes father of a seed: 50% BB and BB 50% – 50% will be normal and 50% of the airlines concerned. According to the information given above, then both sexes also affected. Since this does not sound quite right to me, I would check the matter and ensure that there is no missing data.


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January 3rd, 2009 in Prevent Hair Loss | tags: