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Loose-leaf Version for What Is Life? A Guide to Biology 4E & LaunchPad for What is Life? A Guide to Biology 4E (Twelve Month Access)
4th Edition
ISBN: 9781319154639
Author: Jay Phelan
Publisher: W.H. Freeman & Co
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Chapter 8, Problem 10MC
Summary Introduction
Introduction:
The X chromosome is a large chromosome with many essential genes.
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Students have asked these similar questions
Why are multiple copies of the X chromosome tolerated?
A.
Genes on the X chromosome are not expressed during development.
B.
The extra copies of the X chromosome are inactivated.
C.
There are no genes on the X chromosome that are detrimental when present in multiple copies
D.
The X chromosome only encodes sex related genes
Even though the processes are very similar, mitosis and meiosis are two very distinct processes. What is the difference between meiosis and mitosis?
a.
Mitosis results in two identical sister cells genetically identical to the original parent cell, while meiosis also starts with diploid but results in haploid cells.
b.
Mitosis only occurs in plants and single cell organisms, while meiosis only occurs in animals.
c.
Mitosis starts with diploid but results in haploid cells, while meiosis results in two identical sister cells genetically identical to the original parent cell.
Humans have 46 chromosomes in each somatic cell.a. How many chromosomes does a child receive fromits father?b. How many autosomes and how many sex chromosomes are present in each somatic cell?c. How many chromosomes are present in a humanovum?d. How many sex chromosomes are present in ahuman ovum?
Chapter 8 Solutions
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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
- Humans with aneuploidy who survive usually have incorrect numbersof chromosome 13, 18, or 21 or the sex chromosomes. A possibleexplanation why these abnormalities permit survival is becausea. the chromosomes have clusters of genes that aid in embryonicgrowth.b. the chromosomes are small and carry relatively few genes.c. of X-chromosome inactivation.d. of both b and c.arrow_forward2) A. Explain how polyribosomes form. B. Why might you expect the insertion of 3 DNA base pairs to be less disruptive than th deletion of a single base pair? C. Compare and contrast mitosis and meiosis with respect to their genetic outcomes? D. What are the possible consequences of non-disjunction during cell division? E. How does meiosis increase genetic diversity in populations?arrow_forwardThe human X and Y chromosomes a. are about the same size and have approximately the same number of genes b. include genes that determine an individual's sex c. are almost entirely homologous, despite their different names d. are both present in every somatic cell of males and females alikearrow_forward
- 1. Your father received 23 chromosomes from his mother and 23 chromosomes from his father. How many of your paternal grandfather’s chromosomes did you receive? 2. Enlargement of the spermatogonium and oogonium can be observed in the period of maturation. True or False? 3. Why do gametes contain one of each kind of chromosome? a. Crossing over occurs during prophase I. b. Only one replication of DNA occurs during meiosis. c. The homologous chromosome separate during meiosis. d. The parental cells contain only one of each kind of chromosome. 4. In what period wherein prolonged prophase is the particular process involved? a. period of growth b. 1st reduction division c. period of multiplication d. 2nd reduction division 5. If a cell has 12 chromosomes, how many chromosomes will each of the daughter cells have after mitosis? 6. Somatic cells contain haploid number of chromosomes and undergo mitosis. True or Flase? 7. In which of the following period wherein primary ovocytes are produced?…arrow_forwardWhen Thomas Hunt Morgan crossed his red-eyed F1 generation flies to each other, the F2 generation includedboth red- and white-eyed flies. Remarkably, all the white-eyed flies were male. What was the explanation forthis result? a. The gene involved is on the X chromosomeb. The gene involved is on the Y chromosomec. The gene involved is on an autosome, but only in malesd. Other male-specific factors influence eye color in fruit fliese. None of these is correctarrow_forwardA mature female tiger, with 38 diploid chromosomes in each somatic cell, produces haploid oocytes (egg cells) with how many chromosomes per cell? A. 18 autosomes, and 1 sex-determining chromosome (Y) B. 36 autosomes, and 2 sex-determining chromosomes (XX) C. 18 autosomes, and 1 sex-determining chromosome (X) D. 34 autosomes, and 2 sex-determining chromosomes (XY) E. 17 autosomes, and 1 sex-determining chromosome (X)arrow_forward
- How would each of the following events affect the outcome of mitosis or meiosis? a. Mitotic cohesin fails to form early in mitosis. b. Shugoshin is absent during meiosis. c. Shugoshin does not break down after anaphase I of meiosis. d. Separase is defective.arrow_forwardWhich of the following situations does not describes a chromosomal mutation? Select one: a. A cytosine nucleotide is substituted for thymine nucleotide in a gene. b. A portion of Chromosome 4 is deleted during interphase of meiosis. c. The sister chromatids of Chromosome 18 do not separate during anaphase II. d. A section of Chromosome 17 is duplicated leading to problems in the peripheral nervous system.arrow_forward. A woman with Turner syndrome is found to be colorblind (an X-linked recessive phenotype). Both her motherand her father have normal vision.a. Explain the simultaneous origin of Turner syndromeand color blindness by the abnormal behavior ofchromosomes at meiosis.b. Can your explanation distinguish whether theabnormal chromosome behavior occurred in the fatheror the mother?c. Can your explanation distinguish whether theabnormal chromosome behavior occurred at the first orsecond division of meiosis?d. Now assume that a color-blind Klinefelter man hasparents with normal vision, and answer parts a, b, and c.arrow_forward
- The process of mitotic recombination involves the a. exchange of chromosomal regions between homologsduring gamete formation.b. exchange of chromosomal regions between homologsduring the division of somatic cells.c. reassortment of alleles that occurs at fertilization.d. reassortment of alleles that occurs during gameteformation.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_forwardWhich of the following statements is FALSE? Inactivation of one of the two X chromosomes in the somatic cells of mammalian females..... a. underlies the Calico phenotype in cats. b. leads to cellular mosaicism in females heterozygous for an X-linked gene. c. affects 75 % of the paternal and 25 % of the maternal X-chromosomes of a mammalian body. d. leads to the formation of a Barr body in female cells' nuclei. e. is the mechanism in mammals to compensate for the higher dosage of X-linked genes in females as compared to males.arrow_forward
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