Essentials of Biology (5th International Edition)
5th Edition
ISBN: 9781259660269
Author: Sylvia S. Mader, Dr., Michael Windelspecht
Publisher: Mcgraw-Hill
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 9, Problem 1TC
Although most men with Klinefelter syndrome are infertile, some are able to father children. It was found that most fertile individuals with Klinefelter syndrome exhibit mosaicism, in which some cells are normal (46, XY) but others contain the extra chromosome (47, XXY). How might mosaicism come about? What effects might result?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
In com, male sterility is controlled by maternal cytoplasmic elements. However, the presence of a nuclear fertility restorer gene (F_) restores fertility to male sterile lines.
a. What are the crosses male sterile female x FF male? Give the genotypes and phenotypes of the offspring in each cross. Explain.
An individual is heterozygous for a reciprocal translocation, with the following chromosomes:
A • B C D E F
A • B C V W X
R ST • U D E F
R ST • U V W X
Q. Explain why the fertility of this individual is likely to be less than the fertility of an individual without a translocation.
A human female with Turner syndrome (45,X) also
expresses the X-linked trait hemophilia, as did her father.
Which of her parents underwent nondisjunction during meiosis, giving rise to the
gamete responsible for the syndrome?
Chapter 9 Solutions
Essentials of Biology (5th International Edition)
Ch. 9.1 - Explain the purpose of meiosisCh. 9.1 - Prob. 2LOCh. 9.1 - Prob. 3LOCh. 9.1 - Prob. 4LOCh. 9.1 - Prob. 1CYPCh. 9.1 - Prob. 2CYPCh. 9.1 - Prob. 3CYPCh. 9.1 - Prob. 4CYPCh. 9.1 - Prob. 1ACh. 9.1 - Prob. 2A
Ch. 9.2 - List the phases of meiosis, and briefly describe...Ch. 9.2 - Prob. 2LOCh. 9.2 - Prob. 1CYPCh. 9.2 - Prob. 2CYPCh. 9.2 - Prob. 3CYPCh. 9.2 - Prob. 3ACh. 9.2 - Prob. 4ACh. 9.2 - Prob. 5ACh. 9.2 - Prob. 6ACh. 9.2 - Prob. 7ACh. 9.2 - Prob. 8ACh. 9.2 - Prob. 9ACh. 9.2 - Prob. 10ACh. 9.2 - Prob. 11ACh. 9.3 - Contrast the events of meiosis I and meiosis II...Ch. 9.3 - Prob. 2LOCh. 9.3 - Prob. 1CYPCh. 9.3 - Prob. 2CYPCh. 9.3 - Summarize the major differences among the stages...Ch. 9.3 - Prob. 12ACh. 9.3 - Prob. 13ACh. 9.3 - Prob. 14ACh. 9.4 - Prob. 1LOCh. 9.4 - Prob. 2LOCh. 9.4 - Prob. 3LOCh. 9.4 - Describe how a zygote can receive an abnormal...Ch. 9.4 - Contrast monosomy with trisomy.Ch. 9.4 - Prob. 3CYPCh. 9.4 - Prob. 15ACh. 9.4 - Prob. 16ACh. 9 - Prob. 1BYBCh. 9 - Prob. 2BYBCh. 9 - Prob. 3BYBCh. 9 - Prob. S4.4BYBCh. 9 - Section 8.2 What events occur during prophase,...Ch. 9 - Prob. S8.2BYBCh. 9 - Although most men with Klinefelter syndrome are...Ch. 9 - Prob. 2TCCh. 9 - Prob. 3TC
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- A man who is a carrier of a translocated 15/21 chromosome marries a genotypically normal woman. (1). Show the possible gametes that will be formed by this man if the translocated 15/21 chromosome synapses with chromosome 21 at Prophase I. (2). What is the probability that the first child of the couple will be a phenotypically normal girl? (3). What is the probability that the first child of the couple will be a genetically normal boy?arrow_forwardA human female with Turner syndrome (45,X) alsoexpresses the X-linked trait hemophilia, as did her father.Which of her parents underwent nondisjunction during meiosis,giving rise to the gamete responsible for the syndrome?arrow_forwardRetinoblastoma can be seen as a familial cancer, inherited in an autosomal recessive manner (RB-/RB-), individuals heterozygous for the RB+ and RB- alleles can develop tumor as a result of… A mitotic crossover that leads to homozygosity for RB+ in some cells and RB- in other cells A meiotic mutation in the RB+ allele that leads to homozygosity for RB+ A somatic mutation in the RB- allele that leads to homozygosity for RB+ The fact that RB- is dominant to RB+arrow_forward
- Why does a single X chromosome cause infertility and other abnormalities in Turner Syndrome subjects?arrow_forwardLet’s say there is an organism with two pairs of alleles, W/w and Z/z, each pair is located on a different pair of chromosomes in the organism’s somatic cells. During Prophase, what will you observe in the somatic cells?arrow_forwardn corn, male sterility is controlled by maternal cytoplasmic elements. This phenotype renders the male part of the corn plants (i.e the tassel) unable to produce fertile pollen; the female parts, however, remain receptive to pollination by pollen from male fertile corn plants. However, the presence of a nuclear fertility restorer gene F restores fertility to male sterile lines sing the cardboard chips, simulate the crosses indicated below. Give the genotypes and phenotypes of the offsprings in each cross, and properly label the nucleus and the cytoplasm of each individual in the cross Legend male sterile cytoplasm Male fertile cytoplasm FF nucleus Ff nucleus ff nucleus A. Male sterile female x FF male Explain the phenotype of the offspring B. Male sterile female x Ff male Explain the phenotype of the offspringarrow_forward
- A woman with a balanced reciprocal translocation of Chromosomes 4 and 20 (karyotype, right panel below) is trying to reproduce with a man of normal karyotype (left panel below). Please answer: 1) What are the karyotypes of their respective gametes ()? 2) What are the karyotypes of their potential offspring ()? 3) What are the percentages of each karyotype (gametes and offspring) ()? 4) Indicate which karyotype (of the offspring) will be lethal, carrier or normal (). 5) Do she have reduced fertility and why?arrow_forwardAn individual heterozygous for a reciprocal translocation possesses the following chromosomes: A B ● C D E F G, A B • C D V W X, R S •T U E F G, R S•T U V W Xa. Draw the pairing arrangement of these chromosomes in prophase 1 of meiosis. Mention their gametic composition. b. Draw the alternate, adjacent I, and adjacent II segregation patterns in anaphase I of meiosis. Mention their gametic composition.arrow_forwardA young couple is planning to have children. Knowing that there have been a substantial number of stillbirths, miscarriages, and fertility problems on the husband’s side of the family, they see a genetic counselor. A chromosome analysis reveals that, whereas the woman has a normal karyotype, the man possesses only 45 chromosomes and is a carrier of a Robertsonian translocation between chromosomes 22 and 13. a. List all the different types of gametes that might be produced by the man. b. What types of zygotes will develop when each of gametes produced by the man fuses with a normal gamete produced by the woman? c. If trisomies and monosomies entailing chromosomes 13 and 22 are lethal, approximately what proportion of the surviving offspring are expected to be carriers of the translocation?arrow_forward
- Indicate whether to cross (i) mutant females with wild-type males, or (ii) mutant males with wild-type females, or (iii) both (i.e. reciprocal crosses), to produce an F1 generation that will enable you to determine if the traits are dominant or recessive, and if they are sex-linked (on the X chromosome). Draw mating diagrams and Punnett squares to support your answer. To determine whether the mutant genes are independent or linked, a testcross is more appropriate than using data from the F2 generation. Knowing which are the recessive genes, indicate which individuals you would mate in this testcross. Draw a mating diagram & use the forked line method to predict the outcome of this cross. Conduct the appropriate testcross using Drosophila Lab, record your results and indicate whether the three mutant genes are inherited independently or whether they are linked? Include a chi square analysis to support your conclusion.arrow_forwardA diploid (2n) trihybrid individual with the genotype AaBbDd can make eight genetically different gametes. 2n = 4 n = 2 (1) A d. ID 1 1 2 2 Gt: AaBbDd Loci A/a and D/d are on chromosome 1 and locus B/b is on chromosome 2. Explain how a gamete containing the alleles A, D and b may be produced by meiosis. Refer specifically to meiotic events occurring during Prophase I, Metaphase I, Anaphase I and Anaphase II. (NB: remember to refer to the organism above). COarrow_forwardMules result from a cross between a horse (2 n = 64) and a donkey (2 n = 62), have 63 chromosomes, and are almost always sterile. However, in the summer of 1985, a female mule named Krause who was pastured with a male donkey gave birth to a male foal . Blood tests established that the foal, appropriately named Blue Moon, was the offspring of Krause and that Krause was indeed a mule. Both Blue Moon and Krause were fathered by the same donkey (see the accompanying pedigree). The foal, like his mother, had 63 chromosomes—half of them horse chromosomes and the other half donkey chromosomes. Analyses of genetic markers showed that, remarkably, Blue Moon seemed to have inherited a complete set of horse chromosomes from his mother, instead of the random mixture of horse and donkey chromosomes that would be expected with normal meiosis. Thus, Blue Moon and Krause were not only mother and son, but also brother and sister. Q. Although rare, additional cases of fertile mules giving birth to…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Human Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage Learning
Human Biology (MindTap Course List)
Biology
ISBN:9781305112100
Author:Cecie Starr, Beverly McMillan
Publisher:Cengage Learning
Mitochondrial mutations; Author: Useful Genetics;https://www.youtube.com/watch?v=GvgXe-3RJeU;License: CC-BY