Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 22, Problem 6TYK
Summary Introduction
Introduction:
The number of chromosomes and their structure also contribute to the
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Which of the following is a FALSE statement regarding human chromosomes?
A.
The chromosome number in humans is 2n=46.
B.
Gametes have half number of the chromosomes as in somatic cells.
C.
There are 22 pairs of autosomes and 2 sex chromosomes.
D.
Liver cells can be polyploids. They can have 23, 46, 69 or 92 chromosomes.
Which of the following statements does
not correctly describe the
characteristics of homologous
chromosomes?
Select one:
a. They have the centromeres located a
the same spot.
b. They contain identical alleles.
c. They contain the same genes.
d. The size and shape of the
chromosomes are the same.
Humans produce skin cells by mitosis and gametes by meiosis. Which of the following statements about the nuclei of skin cells is correct?
a. They contain half as much DNA as the nuclei of gametes produced by meiosis.
b. They contain four times as much DNA as the nuclei of gametes produced by meiosis.
c. They contain the same amount of DNA as the nuclei of gametes produced by meiosis.
d. They contain twice as much DNA as the nuclei of gametes produced by meiosis.
Chapter 22 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 22.1 - How do the morphological, biological, and...Ch. 22.1 - What is clinical variation?Ch. 22.2 - What is the difference between prezygotic and...Ch. 22.2 - Prob. 2SBCh. 22.3 - Prob. 1SBCh. 22.3 - Why might insects from different host races be...Ch. 22.4 - Prob. 1SBCh. 22.4 - Prob. 2SBCh. 22 - The biological species concept defines species on...Ch. 22 - Prob. 2TYK
Ch. 22 - A characteristic that exhibits smooth changes in...Ch. 22 - Prezygotic is isolating mechanisms: a. reduce the...Ch. 22 - In the model of allopatric speciation, the...Ch. 22 - Prob. 6TYKCh. 22 - If two species of holly (genus Ilex) flower during...Ch. 22 - Prob. 8TYKCh. 22 - An animal breeder, attempting to cross a llama...Ch. 22 - Prob. 10TYKCh. 22 - Apply Evolutionary Thinking How do human...Ch. 22 - Prob. 12TYKCh. 22 - Prob. 13TYKCh. 22 - Prob. 14TYKCh. 22 - Prob. 15TYKCh. 22 - David Hills of Baylor University noted that three...
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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
- Which of the following statements is false? A. Humans have 1 pair of sex chromosomes B. Humans have 46 chromosomes C. Sex chromosomes are considered a homologous pair D. Humans have 23 pairs of chromosomes E. Humans have 22 autosomesarrow_forwardExplainarrow_forwardThe term endopolyploidy refers to the phenomenon of havinga. too many chromosomes.b. extra chromosomes inside the cell nucleus.c. certain cells of the body with extra sets of chromosomes.d. extra sets of chromosomes in gametes.arrow_forward
- A research scientist is studying diseases associated with homologous chromosomes and notices that the same gene along the chromosome has different function what can you conclude about his findings? A. The homologous pairs have been recombined and therefore he is studying end joining of chromosomes B. He is studying sex chromosomes and the differences are because the chromosomes are from a male species organism C. He has identified different alleles among homologous chromosomes. D. He is studying basic chromosome remodeling during fertilzationarrow_forwardAccording to the Lyon hypothesis,a. one of the X chromosomes is converted to a Barr body insomatic cells of female mammals.b. one of the X chromosomes is converted to a Barr body in allcells of female mammals.c. both of the X chromosomes are converted to Barr bodies insomatic cells of female mammals.d. both of the X chromosomes are converted to Barr bodies inall cells of female mammals.arrow_forwardWhich is NOT an affect of chromosomal translocations? A. Translocation breaks can disrupt existing gene function. B. All of the above. C. Translocated genes may become under the control of different regulatory sequences. D. Translocations can cause regions of the chromosome to be duplicated. E. Translocations can affect the number of chromosomes found in species through evolution.arrow_forward
- Every chimpanzee somatic cell contains 48 chromosomes, in which genes are localized. How many genes linkage groups are there in a chimpanzee somatic cell? Select one: a. 48 O b. 24 O c. 12 O d. 6 O e. 2arrow_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_forwardA diploid organism has 18 chromosomes in its skin cells. Which of the following correctly describe the ploidy of this organism? Select one: a. All gametes contain nine pairs of chromosomes. b. All autosomal cells contain nine chromosomes. c. 2n = 36 and n = 18 d. 2n = 18 and n = 9arrow_forward
- Which of the following best describes the concept of independent assortment? Group of answer choices a. 2n, where n = number of chromosomes b. Gametes receive one of each chromosome pair but which chromosome it receives is decided randomly c. Refers to the Mendelian genetics d. Independent assortment always occurs at prophase 2 in eukaryotic organisms. e. Is the process of specified segregation and assortment of chromosomes in an organism.arrow_forwardWhich of the following is correct as the polyploidization mechanism? options: A, Two related species mate, forming an organism with the combined chromosomes from both parents. B. A single-celled embryo duplicates its chromosomes, but they are not separated into separate cells and remain in a single cell that develops into a viable embryo. C. Both A and B D. Neither A nor Barrow_forwardCan chromosome duplications cause negative effects to an organism? Why or why not? A. No. Duplicated regions of chromosomes are quickly lost by looping out during meiosis. B. Yes. Duplicated regions increase gene dosage, which affects processes like development that require specific amounts of protein. C. No. Cells with duplications function even more efficiently than those without duplications. D. No. Duplicated regions of chromosomes cannot affect gene dosage because the cell can always compensate for extra copies of genes. E. Yes. Duplicated regions require DNA to be replicated, which delays the cell cycle and wastes energy.arrow_forward
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