EBK BIOLOGY
4th Edition
ISBN: 8220102797376
Author: BROOKER
Publisher: YUZU
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Chapter 15, Problem 5TY
Summary Introduction
Introduction: The process of replication takes place in the S phase of the eukaryotic cell cycle. Replication of chromatids results in the formation of a replicated chromosome. The chromatids are separated during the process of the mitotic cell cycle after the completion of replication in the S phase of the cell cycle.
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the kinetochore of a metaphase chromosome is
a. The ends of the chromosome that are duplicated by telomerase.
b. The repeated DNA sequence at the centromere that is composed of cohesion protein.
c. A protein complex that assembles on the outer surface of the chromosome to mediate attachment to the kinetochore microtubules
d. The protein complext that contains cohesion and mediates attachment of the sister chromatids.
Which of the following statements about chromosomes and centromeres is INCORRECT?(choose the letter that corresponds to the answer)
A. A centromere is a constriction visible on metaphase chromosomes.
B. Centromere position is a useful marker for dividing chromosomes into karyotype groups.
C. Centromeric protein-A replaces histone H3 in nucleosomes found at the centromere.
D. Acentric and dicentric chromosomes are genetically stable chromosomes.
A parent cell divides to form two genetically identical daughter cells in the process of mitosis. For mitosis to take place:
A.
the parent cell must divide its DNA in half so each daughter cell gets only the genes needed to carry out its functions. In this way, differentiation occurs.
B.
the parent cell must reproduce its DNA during telophase
C.
the parent cell must first be fertilized
D.
the parent cell must replicate its entire genome prior to mitosis
E.
crossover must be delayed until the second cell division
Chapter 15 Solutions
EBK BIOLOGY
Ch. 15.1 - Researchers usually treat cells with drugs that...Ch. 15.1 - Which phases make up interphase?Ch. 15.1 - Prob. 1BCCh. 15.1 - Prob. 1EQCh. 15.1 - The Eukaryotic Cell Cycle CoreSKILL What...Ch. 15.1 - Prob. 3EQCh. 15.2 - Prob. 1CCCh. 15.2 - Prob. 2CCCh. 15.2 - Mitotic Cell Division Concept Check: What are the...Ch. 15.3 - Prob. 1CC
Ch. 15.3 - Sexual Reproduction Concept Check: What is the...Ch. 15.4 - Variation in Chromosome Structure and Number...Ch. 15 - Prob. 1TYCh. 15 - Prob. 2TYCh. 15 - Prob. 3TYCh. 15 - Prob. 4TYCh. 15 - Prob. 5TYCh. 15 - Which of the following is not an event of anaphase...Ch. 15 - Prob. 7TYCh. 15 - Which of the following statements accurately...Ch. 15 - Prob. 9TYCh. 15 - Aneuploidy may be the result of a. duplication of...Ch. 15 - Prob. 1CQCh. 15 - Prob. 2CQCh. 15 - Prob. 3CQCh. 15 - Prob. 1COQCh. 15 - A diploid eukaryotic cell has 10 chromosomes (5...
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- Metacentric chromosomes have a centromere located: A. near the middle of the chromosome (chromosome has two arms of approx. equal length) B. towards one end (chromosome has one long arm and one short arm) C. near one end of the chromosome (chromosome has one long arm and a knob at the other end)arrow_forwarda. What is the diploid number of chromosomes for a human? b. What is the haploid number of chromosomes for a human? Which cells are considered diploid, gametes or somatic cells? C. d. Which cells are considered haploid, gametes or somatic cells?arrow_forwardHow is homologous recombination for DNA repair different from recombination in meiosis? Choose all correct answers. a. HR in DNA repair requires a double-strand break, but meiotic recombination does not. b. HR in DNA repair requires strand invasion, but meiotic recombination does not. c. HR in DNA repair results in identical chromosomes. Meiotic recombination results in changes to the DNA sequence of the "repaired" chromosomes. d. HR in DNA repair uses a newly synthesized identical chromosome as a template. Meiotic recombination uses a homologous chromosome as a template.arrow_forward
- b. An example of autosome and heterochromosome c. An example of homologous chromosome, sister chromatid and centromere. d. The total number of chromosomes in a metaphase kangaroo cell. e. A sentence to explain the difference between the terms gene and allele that might apply to this species. 5) Suppose that in a species of flowering plant, we cross a plant with red flowers with a short stem with a plant with blue flowers with a long stem. The offspring all have mauve flowers and a long stem. The two characters, flower color and stem length, are found on different chromosomes. What can you conclude about the mode of inheritance of each of the characteristics of this plant species? Incomplete dominance or codominance: C"C", simple A/a dominance b If a progeny with long-stemmed mauve flowers from FI is crossed with a plant with short-stemmed mauve flowers, what proportion of the progeny will have the same genotype as either of the parents? Compulsory Punnett grid. ONA and the principles…arrow_forwardA medical student is studying a liver biopsy taken from a regenerating liver following a partial hepatectomy. The student sees a dividing cell in which the chromosomes are aligned on a plate. Which of the following best describes the character of the chromosomes in the plate? A. 23 chromosomes with 2N DNA total and with each chromosome having one chromatid B. 23 chromosomes with 4N DNA total and with each chromosome having two chromatids C. 46 chromosomes with 2N DNA total and with each chromosome having one chromatid D. 46 chromosomes with 4N DNA total and each chromosome having two chromatids E. 92 chromosomes with 2N DNA total and with each chromosome having two chromatidsarrow_forwardIn the eukaryotic nucleus during interphase, a strand of chromatin consisting of eight conserved histone proteins, and a short region of double-stranded DNA wrapped around them, is: A. properly referred to as the radial miniband B. properly referred to as the supersolenoid C. properly referred to as the chromosome D. properly referred to as the nucleosome E. properly referred to as the solenoidarrow_forward
- 1) What phase of mitosis is this? Answer: 2) What is the indicated structure 1? select one. a. chromosome b. chromosome with two sister chromatids c. centrioles/centrosome d. spindle fibres e. metaphase plate 3)If the diploid (2n) number of this cell is 8 how many chromosomes are present? 4) If the diploid (2n) number of this cell is 8 how many sister chromatids are present? 5) If the diploid (2n) number of this cell is 8 how many homologous pairs are present?arrow_forwardEukaryotic chromosomes a. have only histones b. have DNA and RNA c. have DNA, RNA, and protein d. have DNA, histones, and scaffold protein e. are made of RNA and proteinarrow_forwardA chromosome that has spindle fibers attached to a specific chromosomal region… a. has a localized centromere b. is very rare c. has a holocentric centromere d. has reduced histone content e. has a dispersed centromerearrow_forward
- The amount of DNA per cell of a particular species is measured in cells found at various stages of meiosis and the following amounts are obtained: 3.7 pg , 7.3 pg , and 14.6 pg. Match the amounts of DNA above with the corresponding stages of the cell cycle. You may use more than one stage for each amount of DNA . A. G2 B. After both telophase II and cytokinesis C. Metaphase IIarrow_forwardDuring crossing over,a. chromatids of homologous chromosomes exchange parts.b. mutations occur with higher than average frequency.c. chromatids of nonhomologous chromosomes exchange parts.d. nondisjunction occurs.arrow_forwardFor items 16-25 choose the letter of the best answer. No more explanations. 16. Which process happens simultaneously with the formation of mitotic spindle in prophase? A. disappearance of nucleolus B. chromosomal alignment in the middle C. chromatids separate from each other D. nucleoli reappear 17. In which organism does the formation of the cleavage furrow occurs? A. cat В. сасао treе C. mahogany tree D. sunflower 18. If a certain organism has 2n = 100 chromosomes, how many are its chromosomes in its body cells? A. 2n = 50 B. 2n = 100 C. n = 50 D. n = 100 19. Which of the following is NOT found in a karyogram of a person with Down syndrome? A. varying length of chromosomes B. history of lifetime diseases C. excess chromosomal pairs D. chromosomal number 20. Which of the following statements regarding mitosis and meiosis is FALSE? A. a normal human zygote consists of 23 chromosomes B. meiosis only occurs in the reproductive organs such as ovaries and testes C. all sexual life…arrow_forward
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