Biology: The Unity and Diversity of Life
15th Edition
ISBN: 9780357093795
Author: STARR
Publisher: CENGAGE LEARNING (CUSTOM)
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Chapter 12, Problem 9SQ
Summary Introduction
Introduction: Meiotic division is a division that occurs in a cell that typically lessens the number of chromosomes present in its parent cell by half. Meiotic divisions are more complex than the mitosis. Here, the cell divides twice the times. The first division of diploid cell gives two diploid daughter cells (Meiosis I) and the next division reduces the chromosome number by half that later on give rise to four haploid cells. Every round of division contains four stages that include: the initial prophase metaphase, anaphase and the final telophase.
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At which point in the cell cycle are cells the smallest? a. the beginning of G1 b. S c. G2 d. the beginning of mitosis
What is the purpose of mitosis?
a
It ensures that new nuclei have an exact copy of DNA.
b
It ensures the reproduction of mitochondria and chloroplasts.
c
It guarantees that each daughter cell has half the amount of DNA of parent cells.
d
It prevents the occurrence of cancer cells.
In eukaryotic cells, which occurs during the prophase of mitosis?
A. appearance of the nuclear envelope
B. breakup of the nuclear envelope
C. replication of DNA
D. separation of sister chromatids
E. duplication of chromatids
Chapter 12 Solutions
Biology: The Unity and Diversity of Life
Ch. 12 - BPA and Abnormal Meiosis In 1998, researchers at...Ch. 12 - BPA and Abnormal Meiosis In 1998, researchers at...Ch. 12 - BPA and Abnormal Meiosis In 1998, researchers at...Ch. 12 - One evolutionary advantage of sexual over asexual...Ch. 12 - Prob. 2SQCh. 12 - Prob. 3SQCh. 12 - Prob. 4SQCh. 12 - Meiosis ______ the parental chromosome number. a....Ch. 12 - Dogs have a diploid chromosome number or 78. How...Ch. 12 - The cell in the diagram to the right is in...
Ch. 12 - Which of the following cells can undergo meiosis?...Ch. 12 - Prob. 9SQCh. 12 - Crossing over mixes up ______. a. chromosomes b....Ch. 12 - Crossing over happens during which phase of...Ch. 12 - Prob. 12SQCh. 12 - Which of the following is one of the very...Ch. 12 - Match each term with the best description. _______...Ch. 12 - Prob. 15SQCh. 12 - The diploid chromosome number for the body cells...Ch. 12 - In your own words, describe how genetic diversity...Ch. 12 - Make a simple sketch of meiosis in a cell with a...Ch. 12 - Asexually reproducing animal populations are rare,...Ch. 12 - Figure 12-7 shows how meiosis in a cell with three...
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- The individual chromosomes become visible with a light microscope during which stage of mitosis? a. prophase b. prometaphase c. metaphase d. anaphasearrow_forwardWhich eukaryotic cell-cycle event is missing in binary fission? a. cell growth b. DNA duplication c. mitosis d. cytokinesisarrow_forwardWhich event leads to a diploid cell in a life cycle? a. meiosis b. fertilization c. alternation of generations d. mutationarrow_forward
- Chromosomes are duplicated during what portion of the cell cycle? a. G 1 phase b. S phase c. prophase d. prometaphasearrow_forwardCompare and contrast a human somatic cell to a human gamete.arrow_forwardThe cell pictured to the right is in whichstage of nuclear division?a. metaphase II c. anaphase IIb. anaphase I d. interphasearrow_forward
- The chromosomes become visible under a light microscope during which stage of mitosis? a. prophase b. prometaphase c. metaphase d. anaphasearrow_forwardWhy is there a need to produce diploid type of cell at the of cell division? a.)So that the cells produced are exact copy of the parent cell b.)So that abnormalities of the cell will be avoided c.)So that the purpose of growth happens in the organism d.)So that the copy of DNA is retainedarrow_forwardWhat kind of cell division takes place in a HeLa cell line grown in a laboratory? Name the cell division phase and write down 2 features of the phase.arrow_forward
- What is the first thing that happens when a healthy cell detects damage to DNA? A. It stops the cell cycle B. It slows down the process of cell division C. It divides more quickly D. It becomes a benign tumorarrow_forwardThere are anticancer that are used to prevent the formation of spindle fibers. Why do you think this is effective in treating cancer? What might happen if certain phases of the cell cycle do not function well? Make a reflective essay about cell division.arrow_forwardWhich process leads to independent assortment? a)The process of separating chromosomes b)The random alignment of homologs with respect to the others on the metaphase plate c)The process of forming the mitotic spindle d)The process of cytokinesisarrow_forward
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