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 is true of a species that has a chromosomes number of
2n=16?
a. The species is diploid with 32 chromosomes per cell.
b. The species has 16 sets of chromosomes per cell.
c. Each cell has eight homologous pairs.
d. During the S phase of the cell cycle there will be 32 separate chromosomes.
e. A gamete from this species has four 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.
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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- In animals, which of the following distinguishes meiosis from mitosis? a. Meiosis is a form of asexual division, whereas mitosis is a form of sexual division. b. In mitosis, single loops of DNA are copied, whereas meiosis involves multiple linear chromosomes. O c. Mitosis is used for the repair of cells, whereas meiosis creates cells for sexual reproduction. d. Mitosis occurs in prokaryotic cells, whereas meiosis occurs in eukaryotic cells.arrow_forwardHumans 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.arrow_forwardWhich 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_forward
- The 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_forwardA 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_forward
- Which 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_forwardEvery 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_forward
- Which of the following statements is true? a. Linear chromosome structures observed in a karyotype are actually pairs of sister chromatids. b. Prokaryotic and eukaryotic cells divide through binary fission. c. Because chromosomes of prokaryotes are smaller than eukaryotic chromosomes, prokaryotic nuclei are also smaller. d. The genetic information found in a eukaryotic chromosome makes up the cell's entire genome.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_forwardWhich 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_forward
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