CH 12 Cell Division

Question 1

Cell division purpose (x3)

Answer 1

1. Growth
2. Replacement
3. Repair

Question 2

Result of cell division by Mitosis

Answer 2

Genetically identical daughter cells

Question 3

Animal Gametes

Answer 3

• Sperm cells

- Ova

Question 4

Plant Gametes

Answer 4

• Pollen

- ovule

Question 5

Non-Reproductive cells..

Answer 5

• Somatic Cells
• 2 sets of chromosomes (diploid)
• 2n

Question 6

Reproductive cells…

Answer 6

• Gametes
• 1 pair of chromosomes (haploid)
• n

Question 7

Chromatid

Answer 7

Chromosomes in prep for division

Question 8

Narrow band in a chromosome

Answer 8

Centromere

Question 9

Mitosis divides…

Answer 9

Division of sister chromatids

Question 10

Cytokinesis Divides…

Answer 10

Division of the cytoplasm

Question 11

Meiosis Yield…

Answer 11

• genetically non identical daughter cells;
  1. 1 set of chromosomes
  2. Haploid
  3. n

Question 12

3 Stages of Interphase

Answer 12

1. G1 Phase (1st growth)
2. S Stage (synthesis / DNA rep.)
3. G2 Phase (2nd growth)
   4, M Phase (mitosis phase)

Question 13

Early Prophase

Answer 13

centrioles split and move to opposite poles

- microtubules form

Question 14

ProMetaPhase (late P phase)

Answer 14

• Nuclear Envelope disappears

- Kinetochore formed

Question 15

MetaPhase

Answer 15

• Sister chromatids line up @ centre (metaphase plate)

Question 16

meta means…

Answer 16

Middle

Question 17

Anaphase

Answer 17

• sister chromatids pulled apart by spindle fibers

- Now independent chromosomes

Question 18

Ana means…

Answer 18

To break

Question 19

Telophase

Answer 19

• Nuclear membrane BEGINS to reform

- Chromosomes begin to unwind

Question 20

Tell means…

Answer 20

Across distance

Question 21

Cytokinesis means…

Answer 21

cell movement

Question 22

Cytokinesis

Answer 22

• animals; cleavage furrow forms, thins and breaks

- Plants; cell plate forms

Question 23

Centrosome

Answer 23

microtubule organizing center (centriole)

Question 24

G0 Stage

Answer 24

• Resting stage

- eg. animal neurons & female egg

Question 25

Genes defined

Answer 25

Units of heredity passed thru genes from one gen. to the next

Question 26

2 chromosomes in each pair;

Answer 26

Homologous chromosomes (same length & carry same traits)

Question 27

Sex Chromosomes

Answer 27

• # 23
• Female; XX
• Males; XY

Question 28

22 ‘non-sex’ chromosomes

Answer 28

Autosomes

Question 29

Fertilization

Answer 29

Union Of Gametes

Question 30

Fertilized egg;

Answer 30

Zygote (1 set of chromosomes from each parent)