MITOSIS/MEIOSIS REVIEW Answers only
1 to Its destruction by an enzyme phosphorylated by MPF.
2 restriction point
3 bacterium
3b two or more
4 12
5 a cleavage furrow i
6 The daughter cells have the same number of chromosomes and the same amount of DNA. C Cells that have stopped dividing and are differentiating are in the G1 phase of the cell cycle.
7 2
8 1
9 . 5
10 3
11 . 5
12 a plant cell undergoing cytokinesis
13 3
14 . 5
15 5
16 b
17 centromere
18 A chromatid is a chromatid as long as it is held in association with a sister chromatid at the centromere.
19 / Cytokinesis begins. /The nuclear envelope reappears. /. Chromosomes begin to condense together. / Astral microtubules disappear.
20 46
21 from G2 of interphase through metaphase
22 20
23 centrioles move apart. / nucleolus disintegrates./ nuclear envelope disappears. / spindle is organized.
24 12
25 I 12
26/ the coiling of chromosomes. /the division of centromeres. /the formation of a spindle. / the degradation of the nuclear envelope.
27 8
28 /. cellular respiration /. photosynthesis / mitosis /. DNA replication
29 are prophase I and anaphase I
30 12
31
1. by producing gametes with different combinations of parental chromosomes
2. by allowing the combination of chromosomes from two different individuals
3. by allowing recombination of alleles on a chromosome
32 synapsis and crossing over
33 A gamete from this species has 8 chromosomes.
34 metaphase
35 mutation
36 / The chromosomes condense in both. / The nuclear envelope disassembles in both. / A spindle forms in both./ Each chromosome has two chromatids.
37 They have half the number of chromosomes and half the amount of DNA.
38a method of organizing the homologous chromosomes of a cell in relation to their number, size, and type
39a female somatic cell
40 more than 8 million
41 prophase I
42 . 2
43 1
43b 5
44 .2
45 II
46.I
47 .V
48 VII
49 / production of spores. /reduction of chromosome number in half. /independent assortment of chromosomes. / crossing over and recombination of homologs.
50 This question refers to some essential steps in meiosis described below.
1. 5
2.2
3. 4
4. 3
5.1
51 haploid, and the chromosomes are composed of two chromatids
<