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In people the gene, which causes one form of color-blindness or Daltonism, is located in the X-chromosome. The affected condition is caused by a recessive gene, healthy condition is dominant.
A girl who has emmetropia (normal eyesight), whose father had color-blindness, marries a normal man, whose father also suffers from color-blindness. What kind of sight is expected in the children from this marriage?
Daltonism is also known as deuteranopia which is a rare form of color blindness. In this form, the retina lacks cone cells having opsins that are responsible for the green color vision. As a result, the person cannot distinguish between yellow, red, and green. The person also cannot perceive purple colors.
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- Colour blindness is caused by a sex-linked, recessive gene. If a woman, whose father was colour blind, marries a man with normal colour vision, what percentage of their children will be colour blind? Show using a Punnet square crossIf the mother has normal color vision but her daughter has red-green colorblindness, what must be the genotype of the sex chromosomes of the two parents (with respect to red-green vision)If a father has Marfan syndrome, a dominant disorder, and passes it down to all of his children, but his wife does not have the disorder, what would the punnett square between the father and mother look like? Why is this his genotype if all of his children had Marfan syndrome?
- Color-blindness (c) is a sex-linked recessive trait, while normal color vision (C) is dominant: If two normal-visioned parents have a color-blind son, what are the parent's genotypes? ~What are the chances that their children will be color-blind?Men have XY (or YX) chromosomes and women have XX chromosomes. X-linked recessive genetic diseases (such as juvenile retinoschisis) occur when there is a defective X chromosome that occurs without a paired X chromosome that is not defective. Represent a defective X chromosome with lowercase x, so a child with the xY or Yx pair of chromosomes will have the disease and a child with XX or XY or YX or xX or Xx will not have the disease. Each parent contributes one of the chromosomes to the child. Complete parts a through d below. a. If a father has the defective x chromosome and the mother has good XX chromosomes, what is the probability that a son will inherit the disease? nothing (Type an integer or a decimal. Do not round.) b. If a father has the defective x chromosome and the mother has good XX chromosomes, what is the probability that a daughter will inherit the disease? nothing (Type an integer or a decimal. Do not round.) c. If a mother has one defective x…Colorblindness is an X-linked recessive trait. If a color blind woman is married to a man with normal vision, what are the chances that the biological daughters from this marriage will be colorblind?
- A type of red-green colorblindness is inherited recessively on the X chromosome. A woman who is a carrier had children with a male that is not affected by the disease. Show your answers with the use of a Punnett square • What is the probability (% or likelihood) that a child is affected by the disease? • What is the probability (% or likelihood) that a son is a carrier? (Careful!) • Is there a chance that a girl of the couple is affected by the disease?Color-blindness is an X-linked, recessive trait. If a normal-sighted woman, whose father was color-blind, marries a color-blind man, what is the probability that they will have a son who is color-blind? (use the letter “B”)Suppose gene B is X-linked and is embryonically lethal when homozygous or hemizygous recessive. A man marries a woman who is heterozygous for this gene. They want to have three kids – one girl and two boys. Using a Punnett square, answer the following: What is the probability that they will have a son that dies before birth? _______________________ What is the probability that they will have a daughter who has the same genotype as her mother? _________________ One of their daughters eventually has a child with a man. One of their sons dies before birth. What was the genotype of this daughter? _______________________________ please show me how to get the answer and explain how you got and use a punnet square
- If a father has Marfan syndrome, but the mother does not, and he passes the disease down to only SOME of his offspring, but not all, what would the Punnett square look like? Why is this the father's genotype if only some of his children had Marfan syndrome?A woman with keratosis, a skin condition caused by a rare dominant allele, marries a man with normal skin. If they have a son, what is the probability that he will have normal skin?Color-blindness is an X-linked recessive disorder. Under what circumstances will this condition manifest in a child? Top of Form If the child is a male and its mother has the recessive allele If the child is a female and its father has the recessive allele If the child is a female and its mother has the recessive allele If the child is a male and its father has the recessive allele