Mitosis and Meiosis Flashcards Preview

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Flashcards in Mitosis and Meiosis Deck (16):
1

mitosis

somatic and germ cells

parent cell -> daughter cells
(genetic material = same)

duplicative division

2

Cell cycle - Interphase

Large portion of the cell cycle

1. growth
2. growth + DNA replication
3. growth + final prep for division

3

Cell cycle - mitosis (phase)

Pro
Meta
Ana
Telo

4

somatic cells

body cells 46 chromosomes (diploid 2N)

5

germ cells

sex cells 23 chromosomes haploid (N)

6

key components of mitosis

chromosomes + microtubule spindles (MT)

7

early pro

centrosomes duplicated -> chromatin condensing into chromosoes -> nuclear envelope fragmenting

8

pro

nucleolus disappeared -> duplicated chromosomes visible -> centrosomes moving apart + spindle forms

9

early meta

each chromatid attached to spindle fiber -> spindle fibers strech from each spindle pole and overlap

10

meta

centromeres of duplicated chromosomes aligned at equator -> spindle fibers attached to sister chromatids come form opposite spindle poles

11

ana

sister chromatids part -> daughters moving toward poles

12

telo

nuclear envelopes + nucleoli formed again enclosing the chromosomes

13

mitosis functions

cell replacement, growth, development, regulated (failure -> tumors)

14

meiosis

reductions division

2 divisions -> 4 haploid cells (used to make gametes)

15

ploidy

# of single sets of chromosomes in a cell/organism

single/haploid/N: 23
2 single set/diploid/2N: 46

16

centromeres vs kinectochore

c: cytoskeleton, separates chromosomes

k: special junction where microtubules attach to c