Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 10, Problem 12SQ
Summary Introduction
Introduction: A female mammal’s somatic cells consist of two X chromosomes, which are inherited from its parents. Those two chromosomes are tightly condensed and thereby one of them will get inactivated. This condensed form of X chromosome is called as a Barr body and the process of formation of Barr body is called as X chromosome inactivation. This is a normal process that takes place in the body of female mammals to equalize the expression of the sex cells.
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The characteristic “X” shape of chromosomes is _____.
a.
a result of maximum compaction of the chromosome
b.
due to the wrapping of DNA around histones
c.
only evident during cell division
d.
indicative of a cell that is no longer dividing
e.
only found in the female sex chromosome
Pairs of chromosomes with almost identical geneticcomposition and that are found in cells of both males andfemales are calleda. sex chromosomes.b. autosomes.c. polyploid.d. chromatids.
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.
Chapter 10 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 10 - The expression of a gene may depend on _______. a....Ch. 10 - Prob. 2SQCh. 10 - Binding of ______ to _______ in DNA can increase...Ch. 10 - Prob. 4SQCh. 10 - Prob. 5SQCh. 10 - Muscle cells differ from bone cells because...Ch. 10 - Prob. 7SQCh. 10 - Homeotic gene products _______. a. flank a...Ch. 10 - A gene that is knocked out is ________. a. deleted...Ch. 10 - Which of the following includes all of the others?...
Ch. 10 - Prob. 11SQCh. 10 - Effect of Paternal Grandmothers Food Supply on...Ch. 10 - Prob. 2DAACh. 10 - Effect of Paternal Grandmothers Food Supply on...Ch. 10 - Prob. 12SQCh. 10 - A cell with a Barr body is ___ . a. a bacterium b....Ch. 10 - Operons _____. a. only occur in bacteria b. have...Ch. 10 - Prob. 15SQCh. 10 - Why are some genes expressed and some not?Ch. 10 - Prob. 2CTCh. 10 - Almost all calico cats (one is pictured in FIGURE...Ch. 10 - The photos above show flowers from Arabidopsis...
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- In a diploid cell, two homologous chromosomes are: A) similar , but from two different species B) mirror images of each other C) similar, but from two different people D) identical to each other E) copies of each otherarrow_forwardHuman body cells are diploid, which mean they______ . a. divide to form two cells b. have two full sets of chromosomes c. contain two chromosomesarrow_forwardIn experiment of following chromosomal DNA movement through meiosis, Blue have 44 chromosomes in every cell. Determibne how many chromosomes you would expect to find in the following: a. sperm cell b. egg cell: c. Daughter Cell from mitosis: d. Daughter cell from Meiosis ll:arrow_forward
- Meiosis explains whya. you inherited half of your DNA from each of your parents.b. the sister chromatids in a chromosome are identical to each other.c. each of your somatic cells contains the same DNA.d. zygotes contain half as much DNA as somatic cells.arrow_forwardChoose the option that best fits the blank. Henrietta Lacks was female, so, naturally, all the cells from her derived cancerous cell line have _________ chromosomes. A. Only X B. X and Y C. Only Yarrow_forwardSister 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_forward
- A cell has n=2. How many total chromosomes are in a diploid cell? b. Draw this cell during metaphase of mitosis: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_forwardDuring X chromosome inactivation,______ . a. female cells shut down b. RNA sticks to a chromosome c. pigments formarrow_forward
- Why are individuals with an extra chromosome 21, that causes Down syndrome, more numerous than individuals with an extrachromosome 3 or chromosome 16? A.] There are probably more genes on chromosome 21 than on the others B.] Chromosome 21 is a sex chromosome and chromosomes 3 and 16 are not C.] Down syndrome is not more common, just more serious D.] Extra copies of the other chromosomes are probably fatalarrow_forwardHumans 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?arrow_forwardAlternative forms of the same gene are called _________ . a. gametes c. alleles b. homologous d. sister chromatidsarrow_forward
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