Chapter 8

Mitosis and cytoplasmic division function in _________. a. asexual reproduction of single-celled eukaryotes b. growth and tissue repair in multicelled species c. gamete formation in bacteria and archaea d. sexual reproduction in plants and animals e. both a and b

A cell with two of each type of chromosome has _________ chromosome number. a. diploid c. tetraploid b. haploid d. abnormal

How many chromatids does a duplicated chromosome have? a. one b. two c. three d. four

________ maintains the chromosome number; __________ halves it a. mitosis; meiosis b. meiosis; mitosis

Except for a pairing of sex chromosomes, homologous chromosomes a. carry the same genes _______. c. are the same length b. are the same shape d. all of the above

Interphase is the part of the cell cycle when __________. a. a cell ceases to function b. a cell forms its spindle apparatus c. a cell grows and duplicates its DNA d. mitosis proceeds

After mitosis, the chromosome number of the two new cells is _________ the parent cell's. a. the same as c. rearranged compared to b. one-half of d. doubled compared to

Only __________ is not a stage of mitosis. a. prophase b. interphase c. metaphase \(\quad\) d. anaphase

The main evolutionary advantage of sexual over asexual reproduction is that it produces ____________. a. more offspring per individual b. more variation among offspring c. healthier offspring

Alternative forms of the same gene are ___________. a. gametes c. alleles b. homologous d. oncogenes

Meiosis functions in ______________. a. asexual reproduction of single-celled eukaryotes b. growth and tissue repair in multicelled species c. gamete formation in bacteria and archaea d. sexual reproduction in plants and animals e. both a and b

Crossing over mixes up __________. a. chromosomes c. zygotes b. alleles d. gametes

Sexual reproduction in animals requires ______________. a. meiosis c. spore formation b. fertilization d. a and b

Match each stage of mitosis with the events listed. _____prophase _____metaphase ______anaphase _______telophase a. sister chromatids move apart b. chromosomes start to condense c. new nuclei form d. all chromosomes are aligned in the middle of the cell

Match each term with the best description. ______cell plate _______spindle tumor ______cleavage furrow _____contractile ring ______cancer _______centriole pair _______gamete ______zygote a. lump of abnormal cells b. made of microfilaments c. divides plant cells d. produces the spindle e. migrating, metastatic cells f. made of microtubules g. indentation h. haploid i. first cell of new individual