Cell Division Flashcards Preview

BIOL 141 > Cell Division > Flashcards

Flashcards in Cell Division Deck (14):
1

Needs for cell division

Growth, wound repair, asexual reproduction

2

What must happen before a cell divides

Duplicate organelles

Replicate DNA

Go through cell cycle checkpoints

Grow to sufficient size

3

What phases make up interphase?

G1, S, G2

4

G1

Normal activities of the cell are performed

5

S

DNA synthesis

This is when DNA doubles

6

G2

additional cell growth, organelles are replicated

7

When do the number of chromosomes double?

Anaphase

8

How long is one cell cycle?

Around 24 hours

9

How do microtubules move chromosomes?

kinectochore fibers break down the microtubules which shortens them

and this pulls the chromosomes apart

10

Chromosome

single double stranded DNA sequence (before S)

composed of chromatin

11

What happens after DNA replication?

There are two sister chromatids but still one chromosome

2 double strands

12

What are 2 sister chromatids held together at?

centromere

13

What happens during anaphase?

2 sister chromatids are separated which creates 2 different chromosomes each with 1 sister chromatid

14

Why do cells want to condense DNA?

So it can fit into nucleus and be sorted and separated