Chapter Test: Cell Reproduction Name: ___________________________

______ 1. two identical strands of DNA coiled around proteins, joined by a centromere.

______ 2. arrangement by size and shape of all the chromosomes found in a cell.

______ 3. number of chromosomes in a gamete; the “half” number

______ 4. chromosomes that determines gender of offspring

______ 5. one nucleus divides into two, each with an identical set of chromosomes; maintains genetic consistency

______ 6. chromosomes that are the same in both male and females (#1, #2, etc)

__A__ 7. diseases related to uncontrolled cell division

______ 8. a change in the genetic code of a specific gene

__C__ 9. sperm or egg cell

_____ 10. cell division that produces sperm or egg cells

Multiple ChoiceIdentify the letter of the choice that best completes the statement or answers the question.

______11. Most cells of the human body have ______ chromosomes.a. 16 b. 23 c. 46 d. 78

______12. Most human males have which combination of sex chromosomes?a. XY b. XX c. XO d. OO

___a__13. What’s the main benefit of “crossing over” during meisois ?a.b.

each offspring will get a different mix of genes sperm and egg cells are the same size

c.d.

it eliminates mutationsthe DNA gets copied again

______14. If the egg cell of a female mosquito has 4 chromosomes, how many chromosomes are in its muscle cells?a. 2 b. 4 c. 6 d. 8

______15. How many chromosomes are found in a human sperm cell?a. 8 b. 23 c. 46 d. 92

______16. What happens during interphase of the cell cycle?a. spindle fibers form c. nuclear membrane disappearsb. DNA forms 2 identical copies d. chromatids separate

A. cancer

B. chromosome

C. gamete

D. haploid

E. karyotype

F. meiosis

G. mitosis

H. mutation

I. sex chromosomes

J. autosomes

______ 17. How is DNA arranged during the normal life of a cell (during interphase)?a. coiled into X-shaped chromosomes c. thin threads all tangled togetherb. bundled in homologous pairs d. thick bundles of centromeres

______18. What is the result of mitosis?a. the number of chromosomes is cut in halfb. daughter cells receive the exact same genes as the parent cellc. genetic variety is createdd. a cell doubles its size

Use the diagram for questions 19-21.

______19. The cell in diagram 1 is ina. prophase b. metaphase c. anaphase. d. prophase

______ 20. Which diagram shows telophase?a. 2 b. 3 c. 4 d. 5

______21. Which process is pictured in the diagram? a. mitosis b. meiosis c. crossing over d. binary fission

TRUE or FALSE:

____ _______ 22. Most cells in a plant or animal are “diploid”.

____________ 23. One benefit of meiosis is it produces identical genes, so a species remains constant.

_____________ 24. The gender of an offspring (boy or girl) is determined by the father’s chromosomes.

_____________ 25. Bacteria reproduce by “binary fission”.

ANSWERS: 1 B 6 J 11 C 16 B 21 A2 E 7 A 12 A 17 C 22 T3 D 8 H 13 A 18 B 23 F4 I 9 C 14 D 19 C 24 T5 G 10 F 15 B 20 D 25 T