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Is it possible for both males and females to carry the gene for color blindness?
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- Can a human male be a carrier of red-green color blindness?Can a male be a carrier of red-green color blindness? Provide explanation and Punnet square if applicable.What is the type of genetic inheritance of color blindness? Is color blindness more frequent in men or in women? What is the physiological explanation for color blindness?
- If 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?If you cross a female carrier of color blindness with a normal male, what are the chances of having a color blind male?a) A man with red-green colour blindness is married to a girl with normal colour vision. What is the probability that his children will be colour blind? b) A boy has Duchenne muscular dystrophy. His maternal uncle had died of muscular dystrophy at the age of 21 years. What is the probability that this child's sibs will be affected?
- Two normal visioned parents have a color-blind son. What are the genotypes of the parents?Do you think albinism is caused by a dominant or recessive allele?3) if a normal sighted male has children with a carrier woman a) what proportion of their daughters will have normal colour vision? b) what proportion of their sons will be colour blind?
- Red–green color blindness is caused by an X-linked recessive genetic defect. Hence females rarely exhibit the red–green colorblind phenotype but may be carriers of the defective gene. When a narrow beam of red or green light is projected onto some areas of the retina of such a female carrier, she can readily diff erentiate the two colors, but on other areas she has diffi culty in doing so. Explain.1. A) Apply the concept of sex linkage to explain why color blindness is more prevalent in men than in women. B) Mary is concerned that she may be a carrier for hemophilia, a sex-linked condition located on the X chromosome. Mary is married to John, who doesn't have hemophilia. Assuming Mary is a carrier, what are the genotype ratios expected for Mary and John's kids (specify for boys and for girls)? C) Mary and John have 2 boys, none of them has hemophilia. Can we use this fact as proof that Mary does not carry the allele for hemophilia? Explain your argument.What are the inheritance pattern in colour blindness?