Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 14, Problem 5GP
Human females have two X chromosomes (XX); males have one X and one Y chromosome (XY).
- a. With respect to X chromosome alleles, how many different types of gametes can a male produce?
- b. If a female is homozygous for an allele on an X chromosome, how many types of gametes can she produce with respect to that allele?
- c. If a female is heterozygous for an X chromosome allele, how many types or gametes can she produce with respect to that allele?
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A,b and c please
An XXY male appears as a normal male. He married a sexually normal female who is trisomic
for Patau syndrome.
a. Diagram the cross; give the gametes from each parent and give the progeny.
b. What kinds of offspring as to sexual chromosome aberration may they have? What is the
probability of each kind?
c. What is the probability that the couple will have a son with Patau syndrome?
d. What is the probability of a child with sexual and autosomal chromosome aberration?
e. What is the probability of having normal progeny?
A woman with normal chromosomes mates with a man who also has normal chromosomes. a. Suppose that, in the course of oogenesis, the woman’s sex chromosomes undergo nondisjunction in meiosis I; the man’s chromosomes separate normally. Give all possible combinations of sex chromosomes that this couple’s children might inherit and the number of Barr bodies that you would expect to see in each of the cells of each child. b. What chromosome combinations and numbers of Barr bodies would you expect to see if the chromosomes separate normally in oogenesis, but nondisjunction of the sex chromosomes takes place in meiosis I of spermatogenesis?
Chapter 14 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 14 - Prob. 1DAACh. 14 - Prob. 2DAACh. 14 - Prob. 3DAACh. 14 - Prob. 4DAACh. 14 - Prob. 5DAACh. 14 - Prob. 1SQCh. 14 - Pedigree analysis is necessary when studying human...Ch. 14 - A recognized set of symptoms that characterize a...Ch. 14 - Prob. 4SQCh. 14 - A trait that is present in a male child but not in...
Ch. 14 - Choose the statement that is incorrect. a. A son...Ch. 14 - Prob. 7SQCh. 14 - Prob. 8SQCh. 14 - Klinefelter syndrome (XXY) can most be easily...Ch. 14 - Prob. 10SQCh. 14 - Does the phenotype indicated by the red circles...Ch. 14 - G6PD deficiency is an X-Linked recessive disorder....Ch. 14 - Marian syndrome (Section 13.5) is inherited in an...Ch. 14 - Duchenne muscular dystrophy, which is inherited in...Ch. 14 - Human females have two X chromosomes (XX); males...Ch. 14 - A mutation on an autosome causes a particular...Ch. 14 - Expression of the SRY gene on the Y chromosome...Ch. 14 - The somatic cells of most individuals with Down...Ch. 14 - Mutations in the genes for clotting factor VIII...
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- Human sex chromosomes are XX for females and XY for males. a. With respect to an X-linked gene, how many different types of gametes can a male produce? b. If a female is homozygous for an X-linked allele, how many different types of gametes can she produce with respect to this allele? c. If a female is heterozygous for an X-linked allele, how many different types of gametes can she produce with respect to this allele?arrow_forwardAn organism has a diploid number of 20 in a primary oocyte. a. How many tetrads are present in the meiotic prophase l? b. How many dyads are present in the meiotic prophase II ? c. How many monads migrate to each pole during meiotic anaphase II ?arrow_forwardHemophilia is a disease caused by a gene found on the X chromosome. Therefore, it is referred to as a sex-linked disease. The recessive allele causes the disease. A man with hemophilia (xhy) marries a woman who is homozygous dominant (XHXH. A. Illustrate using a Punnett square the probability that their children will have the disease. B. Will any of their children have the disease? C. Predict the probabilities of their children having the disease.arrow_forward
- Assume that one of Merida's sons, who is heterozygous for orange hair color, married a girl that was also heterozygous. Create a Punnett square to show the possibilities that would result if they had children. a. List the possible genotypes and phenotypes for their children. b. What are the chances of a child with orange hair? c. What are the chantes of a child with yellow?arrow_forwardWhich of the following is a TRUE statement regarding the outcome of meiosis? A. In meiosis, one diploid cell (2n) can produce 2 haploid cells in males (1n). B. In meiosis, four haploid cells (1n) can produce 2 diploid cells (2n) in males. C. In meiosis, one diploid cell (2n) can produce up to 4 haploid cells (1n) in males. D. In meiosis, one diploid cell (2n) can produce 2 diploid cells (2n) in females.arrow_forwardTwo tetrahybrids (AaBbCcDd) were crossed. a. What is the probability of having sperm cells from the male parent with equal number of dominant and recessive genes? b. What is the probability that the progeny will have at least 1 dominant trait? c. Give complete phenotypic ratio expected from this cross.arrow_forward
- 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 S T • U D E F R S T • U V W X a. Draw a picture of these chromosomes pairing in prophase I of meiosis. b. Draw the products of alternate, adjacent-1, and adjacent-2 segregations. c. Explain why the fertility of this individual is likely to be less than the fertility of an individual without a translocation.arrow_forwardA.) In which parent did nondisjunction take place? B.) How many Chromosomes would be in zygote 1, 2, and 3? C.) Which zygote, if any, would be most likely to be healthy? Explain. D.) Name the conditions the non-healthy zygotes have.arrow_forwardWhat is the phenotype of a person who has XXXY sex chromosomes? a. Klinefelter syndromeb. Turner syndromec. Poly-X femalearrow_forward
- A cross between individuals with the genotypes AaBb and aabb produces 1000 offspring. The aabb class contains 380 individuals. a. Are genes a and b linked? Explain your answer. b. What is the linkage configuration in the heterozygote parent. c. What types of gametes will be formed by the heterozygote parent and in what proportions? Give only the allele compositions of the gametes in brackets and their relative proportions.arrow_forwardMendel's observation of the random distribution of two different traits from parents to offspring (giving the 9:3:3:1 ratio of phentypes) was due to A. The random and independent way in which each pair of homologous chromosomes lines up at the metaphase plate during meiosis I. B. The random nature of the fertilization of ova by sperm. C. The random distribution of the sister chromatids to the two daughter cells during anaphase II. D. The relatively small degree of homology shared by the X and Y chromosomes.arrow_forwardChromosomal nondisjunction of the X chromosome in female gametes of humans means that live offspring can include Select one: O A. females with XX, and males with XY or XO O B. females with XX or XXX, and males with XY or XO O C. females with XX or XXX, and males with XY or XXY O D. females with XX, and males with XY E. females with XX or XO, and males with XY or OYarrow_forward
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