2(a) Red-green color blindness is inherited as a recessive X-linked trait. What is the probability that a woman with phenotypically normal parents and a color-blind brother will have a color- blind son? Assume that she has no previous children. 2(b)If the woman (phenotypically normal) in question 2(a) already had a color-blind son, what is the probability that the next child of the phenotypically normal woman will have a color- blind son? Short Answer. Please provide your final answer as a fraction Answer 2b only

2(a) Red-green color blindness is inherited as a recessive X-linked trait. What is the probability that a woman with phenotypically normal parents and a color-blind brother will have a color- blind son? Assume that she has no previous children. 2(b)If the woman (phenotypically normal) in question 2(a) already had a color-blind son, what is the probability that the next child of the phenotypically normal woman will have a color- blind son? Short Answer. Please provide your final answer as a fraction Answer 2b only

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Description: 2(a) Red-green color blindness is inherited as a recessive X-linked trait. What is the probabilitythat a woman with phenotypically normal parents and a color-blind brother will have a color-blind son? Assume that she has no previous children.2(b)If

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter20: Chromosomes And Human Genetics

Section: Chapter Questions

Problem 2CT: Human sex chromosomes are XX for females and XY for males. a. With respect to an X-linked gene, how...

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Red-green color blindness is inherited as an X-linked recessive (Xc). If a color-blind man marries a woman who is heterozygous for normal vision, what would be the expected phenotypes of their children with reference to this character? In your answer, specify in your phenotype descriptions the gender of the children. (For example, don’t just say 75% of the children would be colorblind – you would instead say 100 % of the daughters would be colorblind and 50% of the sons would be colorblind. Note that this is not a correct answer; it is just to give you an idea of how to explain the correct phenotypes of the cross.)___
A color-blind man marries a woman with normal vision whose father was color-blind. Remember that color-blindness is an X-linked recessive trait. Hint: see figure 12.7 in book. A) What is the probability that their first child will be a color-blind daughter? B) What is the probability that their first son will be color-blind?
A husband and wife have normal vision, although both of theirfathers are red–green color-blind, inherited as an X-linked recessivecondition. What is the probability that their first child willbe (a) a normal son, (b) a normal daughter, (c) a color-blind son,(d) a color-blind daughter?
What is the approximate percentage chance that individual V.2, shown in the pedigree diagrams above will have inherited the X-linked recessive allele shown to be carried by his great great grandmother?
In humans, the ABO blood type is under the control of autosomal multiple alleles. Color blindness is a recessive X-linked trait. If two parents who are both type A and have normal vision produce a son who is color-blind and is type O, what is the probability that their next child will be a female who has normal vision and is type O?
A young couple went to see a genetic counselor because each had a sibling with cystic fibrosis. (Cysticfibrosis is a recessive disease, and neither member ofthe couple nor any of their four parents is affected.)a. What is the probability that the female of thiscouple is a carrier?b. What are the chances that their child will havecystic fibrosis?c. What is the probability that their child will be acarrier of the cystic fibrosis disease allele?
Red–green color blindness is an X-linked recessive trait. Susan has normal color vision, but her father is color blind. Susan marries Bob, who has normal color vision. a. What is the probability that Susan and Bob will have a color-blind son? b. Susan and Bob have a daughter named Betty, who has normal color vision. If Betty marries a man with normal color vision, and they have a son, what is the probability that the son will be color blind?
When examining a human pedigree, what features do you look forto distinguish between X-linked recessive inheritance and autosomal recessive inheritance? How would you distinguish X-linkeddominant inheritance from autosomal dominant inheritance in ahuman pedigree?
Red-green colorblindness in humans is recessive and x-linked. if a woman, heterozygous for colorblindness marries a colorblind man, what is the probability that they will have colorblind daughter?
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?
Table shows that Turner syndrome occurs when an individualinherits one X chromosome but lacks a second sex chromosome.Can Turner syndrome be due to nondisjunction duringoogenesis, spermatogenesis, or both? If a phenotypically normalcouple has a color-blind child (due to a recessive X-linkedallele) with Turner syndrome, did nondisjunction occur duringoogenesis or spermatogenesis in this child’s parents? Explainyour answer.
For a recessive condition, two normal heterozygous individuals have children. What is the likelihood of their children being affected by this condition? What is the likelihood of their children being carriers without the condition? What is the likelihood of their asymptomatic children being carriers? Suppose that an individual with the condition has children with a heterozygous individual, what is the likelihood of their children being carriers?