For a common X-linked dominant trait in the population, an unaffected woman and an affected man are planning a family. Which of the following children are possible for this couple? (Select all that apply.)
Q: A couple wish to have children, but the father has an X-linkedrecessive trait. Assuming that the…
A: An organism has phenotype and genotype. Phenotype is the observable characteristics and genotype is…
Q: A human disease known as vitamin D–resistant rickets isinherited as an X-linked dominant trait. If a…
A: Sex determination is the process by which an individual develops into a female or a male. The…
Q: Which of the following statements best describes the inheritance pattern of an X-linked dominant…
A: Pedigree is a family chart showing the inheritance of a particular trait through several generations…
Q: If an individual has the dominant phenotype for an x-linked trait, what is/are the possible…
A: The X linked traits are encoded by the genes present on the X chromosome. Whereas autosomal traits…
Q: Which of the following phenotypes are never passed from father to his son? Please select ALL that…
A: The patterns of inheritance vary for several traits depending on the location of these traits on the…
Q: If a trait is X-linked, which of the following statements is true? Two recessive alleles are needed…
A: X-linked is a trait where a gene is located on the X chromosome. Humans and different warm blooded…
Q: Hemophilia is a disease caused by a gene found on the X chromosome. Therefore, it is a sex-linked…
A: If the woman gets the X chromosome with the hemophilia gene, she will have hemophilia . A man who…
Q: In humans, red–green color blindness is an X-linked recessive trait. If a man with normal vision and…
A: Color blindness is an X-linked, recessive genetic disorder that hampers the ability of a person to…
Q: Could a woman with the X-linked color-blind trait have a son without colorblindness? Use a Punnett…
A: The mechanism of the transfer of genetic material from parent to an infant is the process of…
Q: A woman who is phenotypically normal is married to a phenotypically normal man. Her maternal…
A: Introduction X-linked Inheritance Means That The Gene Causing The Trait Or The Disorder Is Located…
Q: A color-blind man marries a woman with normal vision whose father was color-blind. Remember that…
A: The alleles are generally of dominant and recessive type and some other forms like codominant and…
Q: On average, what fraction of the genome in the pairs of humans would be exactly the same if no…
A: 1. The father donates one-half of his genome to his child. Therefore, the similarity between the…
Q: For an X-linked recessive allele, what proportion of female offspring will be carriers in the cross…
A: X - linked recessive allele - This type of allele is caused due to genetic mutation in the gene. In…
Q: Purple flowers are dominant to white flowers. Identify the phenotype for the following genotype Ff,…
A: The genetic traits of an organism are referred to as a genotype. Physical features are referred to…
Q: In a paternity suit, a woman with type O blood claims that a man with type AB blood is the father of…
A: ABO blood group is a case of multiple alleles and co-dominance. When there are more than two alleles…
Q: Hemophilia is an X-linked recessive disorder and blood type is autosomal. If two healthy parents,…
A: Introduction X linked inheritance is based on the sex chromosome (X chromosome). This inheritance…
Q: Purple flowers are dominant to white flowers. Identify the phenotypefor the following genotype Ff,…
A: Mendel's law of dominance states that any gene will have a minimum of two alleles(traits or forms)…
Q: Red-green color blindness is inherited as an X-linked recessive (Xc). If a color-blind man marries…
A: Heterozygous means an individual having two different alleles of a gene. (In this case, the woman is…
Q: An X-linked gene in man is for the disorder haemophilia. This is a recessive trait. Given that a…
A: Haemophilia is an X-linked inherited disease. Haemophilia gene is recessive and expressed only when…
Q: Brown eyes are dominant to blue eyes. Identify the phenotype for the following genotype BB, Bb, bb…
A: People are made up of many different characteristics and traits that have been passed on from…
Q: Amanda Sefton (Daytripper) has normal fingers and toes and normal color vision. Her mother is normal…
A: As father of Amanda is colour blind, so Amanda may be a carrier of the disease, so her genotype for…
Q: On average, what proportion of X-linked genes in the first individual are the same (inherited from a…
A: The X-Y system of determination of sex is observed in mammals. The sex-liked inheritance contains…
Q: In X-Linked Dominant disorder, a gene responsible for a genetic disorder is located on the X…
A: X-linked dominant inheritance is the genetic conditions associated with mutations in genes on the X…
Q: Duchenne Muscular Dystrophy (DMD) is an X-linked recessive trait. Fill in a Punnett square for a man…
A: DMD is a sex linked disorder . And it's genetics depends on the x chromosome.
Q: A husband and wife have typical vision, although both of their fathers are red-green colorblind (an…
A: It is an inheritance of an X-linked recessive condition. In the recessive condition, only one…
Q: Hemophilia is another example of an X-linked disease caused when a recessive allele (Xh) is…
A: Hemophilia is a bleeding disorder;which shows X linked recessive pattern of inheritance as the…
Q: If a normal male reproduces with a heterozygous normal female, what are the expected genotypes and…
A: Hemophilia is a common hereditary coagulation blood disorder due to deficiency or reduced activity…
Q: If the woman (phenotypically normal) in question 5(a) married to a color-blind man and already had a…
A: Colorblindness is an X-linked disorder. As females have 2 X chromosomes, they have less chance of…
Q: A man who is a dwarf due to achondroplasia and has normal vision marries a color-blind woman of…
A: Autosomal dominant It is a type of inheritance in which the gene is located on the autosomal…
Q: Hemophilia is an X-linked recessive gene. A normal woman who is a carrier for hemophilia marries a…
A: Hemophilia is a disorder in which blood can’t clot properly, excessive bleeding (external and…
Q: Suppose gene B is X-linked and is embryonically lethal when homozygous or hemizygous recessive. A…
A: Let us first discuss the terms used in the question, Homozygous:- A condition when two copies of an…
Q: If a father is unaffected by an X-linked condition and the mother is a carrier, what is the…
A: Genetics is the branch of biology that deals with the study of heredity and variations. Gregor…
Q: One gene has alleles A and a: another gene has alleles B and b. For each of the following genotypes,…
A: Every character is controlled by a gene which has two alleles. The dominant allele can express…
Q: A) Calculate the map distance separating the three genes B) Which gene is in the middle?
A: Symbol white eyes = r short wings = l ebony bodies = g red eyes = R long wings = L Gray bodies…
Q: Could a woman who expresses the x-linked color-blind trait have a son with normal vision?
A: BASIC INFORMATION COLOR BLINDNESS it is an X - linked recessive trait in this the eye is not…
Q: e. If couple I-1 and I-2 will have a son, what is the of having the disorder? probability f. If…
A: X linked disorder The disorder which inherited with the X chromosome.
Q: Considering an X-linked dominant trait, if an affected woman and an unaffected man decide to have…
A: X- linked dominant inheritance . In X linked dominant trait one dominant allele of the trait can…
Q: Along with the trait in the pedigree, individual IV-6 and the woman are also both heterozygous for…
A: A pedigree is a genetic representation of a family tree that shows how a trait or disease is passed…
Q: In cats, black fur color is caused by an X-linked allele; the other allele at this locus causes…
A: The question is related to X chromosome inactivation in mammalian females. One of the X chromosomes…
Q: For the purpose of the assignment, we will refer to XY individuals as male and XX individuals as…
A: Genetics is the branch of biology that deals with the study of genes, their variation, and heredity…
Q: An unaffected woman, who is heterozygous for an X-linked allele causing Duchenne muscular dystrophy,…
A: The alleles are the alternative forms of a gene that are located on the same locus of the homologous…
Q: Jane is heterozygous for both X-linked traits like her mother. Her father is normal for both…
A: Let Xd represents a X linked diseased/abnormal trait. According to question, Jane is heterozygous…
Q: What is the chance the parents would have a color-blind boy? A color-blind girl? What about a girl…
A: Colour Blindness It is a kind of disability which involves the inability to distinguish between…
Q: Color-blindness is caused by an X-linked recessive allele. A color-blind woman marries a man with…
A: X linked recessive genes shows the criss cross pattern of inheritance . In the criss cross…
Q: In cats, coat color is an X-linked trait with incomplete dominance. Yellow coat is caused by the…
A:
Q: Two parents have the following genotypes. FF and Ff. Which of the following genotypes is not…
A: Solution:- If the parents have the FF and Ff genotypes, The children get following genotypes, they…
Q: The father of two children is type O+, and the mother is type A+. The children are O- and A+. Given…
A: Human blood type is determined by co-dominant alleles. There are three different alleles for human…
Q: For the Y-linked gene, use T for hypertrichosis. For X-linked genes, use the letters H for blood…
A: Given: For the Y-linked gene, Hypertrichosis (T) For X-linked gene, Blood trait (H), and eye trait…
Q: Amanda Sefton (Daytripper) has normal fingers and toes and normal color vision. Her mother is normal…
A: Syndactyly is an autosomal dominant condition.
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- Redgreen color blindness is an X-linked recessive disorder in humans. Your friend is the daughter of a color-blind father. Her mother had normal color vision, but her maternal grandfather was color-blind. What is the probability that your friend is color-blind? (a) 1 (b) (c) (d) (e) 0Attached are three pedigrees. For each trait, considerwhether it is or is not consistent with X-linked recessiveinheritance. In a sentence or two, indicate why or why not.X-linked ichthyosis is an X-linked recessive trait that manifests in part as dry, scaly skin (“ichthy-” = fish or fish like). Suppose a couple are considering having a child together. Parent A is heterozygous for the ichthyosis allele while Parent B is hemizygous negative for the ichthyosis allele. What is the probability their child would be unafflicted with ichthyosis but be a carrier of the ichthyosis-causing allele? a.0% b.25% c.50% d.75% e.100%
- Duchenne’s muscular dystrophy (DMD) is an X-linked disease that causes progressive muscle weakness and is often fatal. “XD” represents the wild type allele, and “Xd,” the mutant allele. Jonah is XDXd Y and his brother Pete is Xd Y. Jonah and Pete BOTH have DMD of equal severity and phenotypes. You might have thought Jonah’s DMD would be less severe given his genotype. To better understand the situation, you investigate Jonah’s Xist chromosome region in his defective muscle cells. Which of the following is consistent with his phenotype? (Select all that apply.) The Xd-containing chromosome is inactive in defective muscle cells. The XD-containing chromosome has a methylated Xist promoter. The XD-containing chromosome has an unmethylated Xist promoter. The Xd-containing chromosome is active in defective muscle cells.An individual with 46, XX genotype is diagnosed with Duchenne-type Muscular Dystrophy, a recessive X-linked disorder. Genetic tests confirm that this individual is a heterozygote for this disorder. Briefly, but specifically, explain how it’s possible that they are showing symptoms of this disorder.Classical hemophilia is a sex-linked disease caused by a recessive gene on the X chromosome. (Hemophilia refers to diseases that cause delays in blood clotting.) If a woman who is acarrierof classical hemophilia has children with a normal male, give the ratios of the possible offspring with respect to classical hemophilia. Be sure to state both the genotypes and the phenotypes of each offspring. For genotypes, use X for a normal X chromosome, Xh for an X chromosome with the hemophilia gene, and Y for a normal Y chromosome. For phenotypes, if the offspring is female, be sure to state if homozygous normal, a carrier, or has the disease. If the offspring is a male, be sure to state if normal or has the disease.
- Hemophilia is another example of a X-linked disease caused when a recessive allele (Xh) is expressed. If a normal male reproduces with a heterozygous normal female, what are the expected genotypes and phenotypes? Will any of their daughters develop hemophilia? you must also give the gender of the child in your genotype and phenotype descriptions here.The determiner for brown eyes (B) is dominant to blue eyes (b) and is not X-linked. A colorblind man with brown eyes, whose mother was blue-eyed, marries a blue-eyed woman having normal vision, whose father was colorblind. Show the expected phenotypes ratio of their children involving eye color, color blindness, and sex.In 1952, an article in the British Medical Journalreported interesting differences in the behavior ofblood plasma obtained from several people who suffered from X-linked recessive hemophilia. Whenmixed together, the cell-free blood plasma from certain combinations of individuals could form clots inthe test tube. For example, the following table showswhether clots could form (+) or not (−) in variouscombinations of plasma from four people withhemophilia:1 and 1 − 2 and 3 +1 and 2 − 2 and 4 +1 and 3 + 3 and 3 −1 and 4 + 3 and 4 −2 and 2 − 4 and 4 −What do these data tell you about the inheritance ofhemophilia in these individuals? Do these data allowyou to exclude any models for the biochemical pathway governing blood clotting?
- The most common form of colorblindness is a recessive, sex-linked hereditary con dition caused by a defect on the X chromosome. Females are XX, while males are XY. Individuals inherit one chromosome from each parent, with equal probability; for example, an individual has a 50% chance of inheriting their father's X chromosome, and a 50% chance of inheriting their father's Y chromosome. If a male has an X chromosome with the defect, he is colorblind. However, a female with only one defective X chromo some will not be colorblind. Thus, colorblindness is more common in males than females; 7% of males are colorblind but only 0.5% of females are colorblind. (a) Assume that the X chromosome with the wild-type allele is X+ and the one with the disease allele is X. What is the expected frequency of each possible female genotype: X+X+, X+X¯, and X-X-? What is the expected frequency of each possible male genotype: X+ Y and X-Y? (b) Suppose that two parents are not colorblind. What is the…Hemophilia is another example of a X-linked disease caused when a recessive allele (Xh) is expressed. If a normal male reproduces with a heterozygous normal female, what are the expected genotypes and phenotypes? Will any of their daughters develop hemophilia? As in the previous question, you must also give the gender of the child in your genotype and phenotype descriptions here.Shown above is a family pedigree tree in which family members afflictedwith the disease Haemophilia are shown with filled-in squares (male) or circles (females). A couple is trying to determine the likelihood of passingon the disease to their future children (represented by the ? symbolabove) because the hemophilia runs in the woman’s family. Turner syndrome is a disease in which an individual is bornwith only a single X chromosome. Suppose the woman in thecouple is a carrier for hemophilia and has a child with Turnersyndrome. Would this child have the disease?
