Biology: The Unity and Diversity of Life
15th Edition
ISBN: 9780357093795
Author: STARR
Publisher: CENGAGE LEARNING (CUSTOM)
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Chapter 10, Problem 11SQ
Summary Introduction
Introduction: Female mammal’s somatic cells consist of two X chromosomes that they inherit from their parents. Those two chromosomes are tightly condensed and thereby one of them will get inactivated. This condensed form of X chromosome is called as Barr body and the process of formation of Barr body is called as X chromosome inactivation. This is a normal process carried out in the body of female mammals to equalize the expression of the sex cells.
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Chapter 10 Solutions
Biology: The Unity and Diversity of Life
Ch. 10 - Effect of Paternal Grandmother's Food Supply on...Ch. 10 - Effect of Paternal Grandmother's Food Supply on...Ch. 10 - Effect of Paternal Grandmother's Food Supply on...Ch. 10 - Gene expression does not vary by ___ . a. cell...Ch. 10 - Binding or ___ to ___ in DNA can increase the rate...Ch. 10 - Muscle cells differ from bone cells because they...Ch. 10 - Prob. 4SQCh. 10 - Mechanisms that govern gene expression do not...Ch. 10 - Prob. 6SQCh. 10 - Prob. 7SQ
Ch. 10 - Prob. 8SQCh. 10 - Which of the following includes all of the others?...Ch. 10 - Prob. 10SQCh. 10 - Prob. 11SQCh. 10 - A cell with a Barr body is ___ . a. a bacterium b....Ch. 10 - Prob. 13SQCh. 10 - Which of the following statements is incorrect? a....Ch. 10 - Prob. 15SQCh. 10 - Explain why somebut not allof an organism's genes...Ch. 10 - Do the same mechanisms that govern gene expression...Ch. 10 - Prob. 3CTCh. 10 - The photos below show flowers from two Arabidopsis...
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- 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 genesarrow_forwardA person with cancer walks into the classroom. As a biology class, we ask if we can examine some of the cancerous cells and find that many of these cancerous cells have an extra chromosome 10 (trisomy) leading to more cyclin for forming the MPF being made, leading to uncontrollable cell division (i.e. tumor and progression to cancer). What would cause extra chromosomes in cells (be it somatic or gametic cells)? Select one: a. None of these choices are linked to how sister chromatids separate and would lead to extra chromosomes in daughter cells of cell division. b. APC not functioning correctly to add ubiquitin to the cohesins, thus sister chromatids do not split correctly during cell division c. MPF itself would cause more chromosome replication d. APC is overly functioning adding cohesins to the sister chromatidsarrow_forwardAlmost all calico cats (one is pictured in FIGURE 10.7B) are female. Why? B When this calico cat was an embryo, one of the two X chromosomes was inactivated in each of her cells. The descendants of the cells formed her adult body, which is a mosaic for expression of X chromosome genes. Black fur arises in patches where genes on the X chromosome inherited from one parent are expressed; orange fur arises in patches where genes on the X chromosome inherited from the other parent are expressed. FIGURE 10.7 Animated X chromosome inactivation.arrow_forward
- Sister chromatids are NOT _____. A. tightly linked together at a centromere. B. present throughout the cell cycle C. created when DNA is replicated. D. identical to each other.arrow_forwardHumans 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_forwardBarr bodies area. genetically active X chromosomes in males.b. genetically inactive X chromosomes in females.c. genetically active Y chromosomes in males.d. genetically inactive Y chromosomes in females.arrow_forward
- and down syndrome the victim has an extra chromosome 21. Therefore, down syndrome is a kind of ___ and results from ___. A. aneuploidy... nondisjunction of chromosome 21 during meiosis B. polyploidy... occurrence of meiosis without cytokinesis C. translocation… insertion of a transposon into chromosome 21 D. replication air… An extra cycle of DNA synthesis during the five phasearrow_forwardCat fur coat color genetics is interesting. Orange fur is dominant (''B'') to black fur (''b'') and piebald, which is white spotting, is dominant (''S'') to non-white-spotted (''s''). Both of those genes are located on the X chromosome. In addition, in cats, somatic cells exhibit X-inactivation randomly, which explains why there are tortoiseshell cats (when heterozygous, have orange and black spots) as well as calico cats (orange and black but also with white spots). An orange and white spotted male is mated with a tortoiseshell female. State the genotype of the male and the female.arrow_forwardCat fur coat color genetics is interesting. Orange fur is dominant (''B'') to black fur (''b'') and piebald, which is white spotting, is dominant (''S'') to non-white-spotted (''s''). Both of those genes are located on the X chromosome. In addition, in cats, somatic cells exhibit X-inactivation randomly, which explains why there are tortoiseshell cats (when heterozygous, have orange and black spots) as well as calico cats (orange and black but also with white spots). An orange and white spotted male is mated with a tortoiseshell female. Draw a dihybrid Punnet square to show the possible offspring:arrow_forward
- 1) A human cell containing 22 autosomes and a Y chromosome is A) a sperm. B) an egg. C) a zygote. D) a somatic cell of a male. E) a somatic cell of a female.arrow_forwardA human cell containing 22 autosomes anda Y chromosome is(A) a sperm.(B) an egg.(C) a zygote.(D) a somatic cell of a malearrow_forwardCrossing over _________________________. a. only occurs in animal cells. b. involves breakages and exchanges between sister chromatids c. involves centrioles d. results in new combinations of alleles being channeled into the daughter cells e. occurs during mitosisarrow_forward
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