Download cell-division-review-no-answers

Cell Division Review
True/False
Indicate whether the statement is true or false.
____ 1. Each human somatic cell contains two copies of each chromosome for a total of
23 homologous
chromosomes.
____ 2. Gametes are diploid so that when fertilization occurs, the resulting zygote will
have the characteristic number
of chromosomes for that species.
____ 3. Cells spend most of their lifetime in interphase.
____ 4. Asexual reproduction occurs by mitosis.
____ 5. During telophase, a nuclear envelope surrounds each new set of chromosomes.
____ 6. Chromatids separate from each other during telophase.
____ 7. After mitosis and cytokinesis, each new cell has a complete set of the original
cell’s chromosomes.
____ 8. Meiosis results in the formation of haploid cells from diploid cells.
____ 9. Meiosis produces four nuclei that have a different chromosome number from the
original cell’s nucleus.
____ 10. While paired together during the second division of meiosis, two chromosomes
may exchange segments of
DNA.
____ 11. Malignant cancer is the form that has spread throughout the body.
____ 12. A biopsy is the removal of tissue from a tumor to detect signs of cancer.
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____ 13. Chromatids are
a. dense patches within the nucleus.
b. bacterial chromosomes.
c. joined strands of duplicated genetic material.
d. prokaryotic nuclei.
____ 14. A diploid cell is one that
a. has two homologues of each chromosome.
b. is designated by the symbol 2n.
c. has chromosomes found in pairs.
d. All of the above
____ 15. How many chromosomes are in the body cells of an organism that has a haploid
number of 8?
a. 4 c. 12
b. 8 d. 16
____ 16. growth : G1 ::
a. mitosis : meiosis c. cytokinesis : M
b. mitochondria replication : S d. DNA copying : S
____ 17. A typical human cell contains 46 chromosomes. After mitosis and cell division,
each of the two new cells
formed from the original cell
a. gets 23 chromosomes.
b. grows new chromosomes from existing DNA.
c. gets a complete set of 46 chromosomes.
d. None of the above
____ 18. Refer to the illustration above. Which of the following correctly indicates the
order in which these events
occur?
a. “A,” “B,” “C,” “D” c. “B,” “A,” “C,” “D”
b. “C,” “B,” “A,” “D” d. “A,” “C,” “B,” “D”
____ 19. Refer to the illustration above. During which stage do the centromeres divide?
a. “A” c. “C”
b. “B” d. “D”
____ 20. Which of the following statements is true?
a. Prokaryotes divide by mitosis.
b. Eukaryotes have circular chromosomes.
c. Animal cells form new cell walls when they divide.
d. Cytokinesis differs in plant cells and animal cells.
____ 21. Separation of homologues occurs during
a. mitosis. c. meiosis II.
b. meiosis I. d. fertilization.
____ 22. The difference between anaphase of mitosis and anaphase I of meiosis is that
a. the chromosomes line up at the equator in anaphase I.
b. centromeres do not exist in anaphase I.
c. chromatids do not separate at the centromere in anaphase I.
d. crossing-over occurs only in anaphase of mitosis.
____ 23. When crossing-over takes place, chromosomes
a. mutate in the first division.
b. produce new genes.
c. decrease in number.
d. exchange corresponding segments of DNA.
____ 24. Creates cross section views using small amounts of radiation to view particular
organs to detect abnormalities.
a. biopsy c. CT Scan
b. MRI d. X-Ray
____ 25. Method(s) used to treat cancer include
a. removal of tumor c. radiation
b. chemotherapy d. all the above
Completion
Complete each statement.
26. Following replication of its DNA, each chromosome contains two
____________________, which are
attached to each other by a centromere.
27. “Cables” made of microtubules that extend from the poles of a cell to the centromeres
during cell division are
called ____________________.
28. After a new nuclear membrane forms during telophase of mitosis or meiosis, the
____________________
divides, resulting in two cells.
29. A reciprocal exchange of corresponding segments of DNA is called
____________________.
30. A uses magnets and radiation to detect abnormalities in the structure and
function of organs.
31. The cells resulting from meiosis in either males or females are called
____________________.
32. Collectively, the time spent in G1 + S + G2 is called ____________________.
33. In mitosis, anaphase follows ____________________.
34. During cell division, plant cells form a new ____________________ in the center of
the cell.
35. In eukaryotic cells, ____________________ takes place after the nucleus divides.
36. The stage of meiosis during which homologues line up along the equator of the cell is
called
____________________.
37. After a new nuclear membrane forms during telophase of mitosis or meiosis, the
____________________
divides, resulting in two cells.
38. The process called ____________________ guarantees that the number of
chromosomes in gametes is half
the number of chromosomes in body cells.
39. A reciprocal exchange of corresponding segments of DNA is called
____________________.
40. The cells resulting from meiosis in either males or females are called
____________________.
Essay & Drawing
41. Compare and contrast mitosis and meiosis.