1. Red-green color blindness is an X-linked recessive trait in humans. Polydactyly (extra fingers and toes) is an autosomal dominant trait. Martha has normal fingers and toes and normal color vision. Her mother is normal in all respects, but her father is color blind and polydactylous. Bill is color blind and polydactylous. His mother has normal color vision and normal fingers and toes. Bill and Martha are married and about to have a child. a. Draw out a pedigree for all people mentioned in this problem. Fill in the left side of the box for anybody who is colorblind and fill in the right side of the box for anybody who is polydactyl. b. Determine the genotypes of Bill and Martha (it should look something like XBYDD) c. What is the probability that they will have a colorblind son with normal fingers?

1. Red-green color blindness is an X-linked recessive trait in humans. Polydactyly (extra fingers and toes) is an autosomal dominant trait. Martha has normal fingers and toes and normal color vision. Her mother is normal in all respects, but her father is color blind and polydactylous. Bill is color blind and polydactylous. His mother has normal color vision and normal fingers and toes. Bill and Martha are married and about to have a child. a. Draw out a pedigree for all people mentioned in this problem. Fill in the left side of the box for anybody who is colorblind and fill in the right side of the box for anybody who is polydactyl. b. Determine the genotypes of Bill and Martha (it should look something like XBYDD) c. What is the probability that they will have a colorblind son with normal fingers?

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter11: The Basic Principles Of Heredity

Section: Chapter Questions

Problem 6TYU: Redgreen color blindness is an X-linked recessive disorder in humans. Your friend is the daughter of...

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1. Red-green colorblindness is caused by a recessive allele (x) at an X-linked gene, and albinism is caused by a recessive allele (a) at an autosomal gene. A phenotypically normal woman (Sara) has a father who is colorblind, and she knows that she is a carrier for albinism. She plans to have a child with a colorblind man (Abdul) who is also a carrier for albinism. What is the probability that Sara and Abdul's child will have one of the conditions, but not both? (C. Follow the steps below to answer this question. a) What is the cross? b) What are the target genotypes? Note: it might be useful to come back to this one and double- check it after you have completed step c, below. Break this down to the single gene level by answering the following questions: a. What is the proportion of normal to albino offspring? Show the Punnett square: b. What is the proportion of normal to colorblind offspring? Show the Punnett square: d) What is the probability that Sara and Abdul's child will have one…
1. Mary and Joe are both healthy individuals. Joe has a mother who suffered from cystic fibrosis, an autosomal recessive disorder. Mary has been genetically tested in order to find out if she has the allele responsible for this disease and her tests came out positive. They are planning on having two children together in the near future. What is the probability that she and Joe will have either 2 boys who have the disorder, OR that they have one boy who has the disorder and one boy who does not? (in other words, what is the probability that any of these two outcomes takes place? a) 1/8 b) 1/16 c) 3/32 d) 1/64 e) 9/64
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Red-green color blindness is inherited through an X-linked, recessive allele (b). Two parents, Fred and Ginger, have normal vision. They have two daughters, Takiyah and Kelly, who also have normal vision, and a color-blind son, David. 3. Daughter Kelly has a color-blind son, Kevin. Daughter Takiyah has five sons, all with normal vision. What are the genotypes of all the individuals? Show all your work! Fred Ginger David Takiyah Kelly Kevin Takiyah's five sons If Kelly marries a man with normal vision, what is the probability that she'll have a color-blind son? a color-blind daughter?
5. A woman who is a carrier for colorblindness marries a colorblind man. The woman nas 5 nngers on each hand and the man, whose father had father had 5 fingers, has 6 fingers. (Polydactyly-have 6 fingers on each hand-is inherited as an autosomal dominant trait. What percent of their children do you expect to be colorblind with 5 fingers? man with type AB blood is married to a woman with type O blood. They have 2 natural children 01one adopted child. 'One child has type A blood, one has type B blood and the other has type O blood. Whi s adopted?
5. A female child, Della, has the autosomal dominant condition of polydactyly. Della's mother has the normal number of fingers and toes like her parents and brother (Della's maternal grandparents and uncle). Della's father has six fingers on each hand and so did two of his three sisters and his mother (Della's paternal aunt and grandmother). Della has a younger brother who has the normal number of fingers and toes. Give the genotype of each parent and each child. Della's Mother Della's Father Della Della's Brother 5. Draw a pedigree demonstrating polydactyly in the family above. 7
3. Pattern baldness is a recessive sex-linked trait. Jake has a full head of hair. His wife Jeannie is heterozygous for the pattern baldness gene. A) What is Jeannie's phenotype? Why? B) What are the chances that their children will have pattern baldness?
X-linked recessive, carrier mother Unaffected. Carrier mother father X Y XX |Unaffected |Affected I Carrier XY Unaffected Unaffected Carrier daughter Affected son daughter U.S. National Library of Medicine son Color blindedness is a sex-linked trait. If we could see the pedigree chart for several more generations of the family illustrated here, we would expect A) more males to be color blind. B) móre females to be color blind. no females to ever be color blind. D) an equal number of males and females that are color blind.
A man affected with Cacamania and a woman affected with Cacamania mate and have an unaffected daughter. Which of the following mechanisms of inheritance can not be ruled out? Choose all that can not be ruled out. Autosomal Recessive Autosomal Dominant Y-linked X-linked Recessive All of the mechanisms shown can be ruled out X-linked Dominant
1. Hemophilia is a disease inherited as a X-linked recessive trait while pattern baldness is controlled by an autosomal gene that is dominant in males and recessive in females. A hemophilic man who is also homozygous for baldness has children with a woman who is not hemophilic but a carrier and heterozygous normal-haired. Show the parental genotypes, the Genotypic ratio (GR) of the offspring and their phenotypic ratio. Separate the total number of the male offspring from female offspring. For example, if there are 8 total number of offspring, count how many are females and how many are males. So if there are 4 females, then the denominator for the genotypic ratio and phenotypic ratio for female offspring is 4. You can convert it to percentage if you want. Answer the following: a. Among the female offspring, what is the probability of having hemophilic but normal haired child? b. Among the male offspring, what is the chance of having a child with normal blood clotting but bald?
2. Can a color-blind female have a son that has normal vision? Color blindness is caused by a sex-linked recessive allele. Explain. Do the Punnett square. *use N = normal vision and n = color blind over X and Y chromosomes. 3. Muscular dystrophy is a sex-linked trait. What parental genotypes could produce a female with=muscular dystrophy? Do the Punnett square. *use M = normal muscles, and m = muscles missing dystrophin protein over X and Y chromosomes. 4. In humans, red-green color-blindness is due to a recessive gene X^c. Normal vision results from the dominant gene X^c. If a homozygous woman of normal vision marries a color-blind man, what type of vision will be expected in their children?
r blindness is recessive, x-linked trait. Ia marriages between a man who is colorblind and a woman a carrier what percentage of the children can be expected to be sons who are not color blind? What entage of the children can be expected to be daughters who are carriers? What percentage of the children can be expected to be daughters who are not carriers at all? 42 Se