3a.1 cell division

Question 1

what are all cells made of?

Answer 1

mitosis

Question 2

what ar\e the only type of cells not made from mitosies

Answer 2

gametes

Question 3

when a cell divides by mitosis it…

Answer 3

• splits into 2 daughter cells
  -where each has a diploid number of chroms

Question 4

what are daughter cells?

Answer 4

genertically identical from the cells they came from & each other

Question 5

what is a diploid

Answer 5

full set of chromosomes

(reg cells)

Question 6

what is a haploid

Answer 6

half set of chromosomes

(gametes)

Question 7

what always happens before mitosis?

Answer 7

dna replication

Question 8

when can mitosis happen?

Answer 8

• asexual reproduction
• repair of tissue
• growth

Question 9

what are the stages of mitosis

( 5)

Answer 9

• interphase
• prophase
• metaphase
• anaphase
• telophase

Question 10

interphase blurt?

Answer 10

-b4 mitosis

• DNA replication
• cell organelles are synthesised

Question 11

prophase

Answer 11

-chromosomes shorten and thicken to become visible
- nuclear membrane breaks down
- spindle fibres appear

Question 12

metaphase?

Answer 12

• chromosomes line up on spindle fibres
• line up along equator of cell

Question 13

anaphase?

Answer 13

chromosomes are seperated & pulled away to poles by shortening of spindle fibres

Question 14

telophase?

Answer 14

• nucelar membranes reform
• chromosomes disperse
• cell divides into 2 via cytokinesis

Question 15

where would meisos occur

in humans

in plants

Answer 15

ovaries and testes

ovule and anther

Question 16

what does meisos result in??

Answer 16

genetic variation

Question 17

how many phases and stages in meisos

Answer 17

2 phases of mitosises, 8 stages

Question 18

interphase 1

Answer 18

• DNA replication

Question 19

prophase 1

Answer 19

chromosomes become visible and thicken

homologous pairs line up

non-sister chromosomes join up and trade sections

Question 20

metaphase 1

Answer 20

• chromosomes line up on spindle fibres
• line up along equator of cell

Question 21

anaphase 1

Answer 21

-homologous chromosomes attacth to splindles

• splindes contract and pull apart pairs

Question 22

telo phase 1

Answer 22

• nucelar membranes reform
• chromosomes disperse
• cell divides into 2 via cytokinesis

results in 2 nuclei w 46 chromosomes

Question 23

prophase-telophase 2

Answer 23

process in general repeated,

one chromatic from each duplicated chromosome , separates

results in 4 haploid daughter cells

Question 24

meisosi phase 1 and phase 2 difference + blurt

Answer 24

1 - homologous chromosomes separate to create daughter nuclei

2-

2 daughter nuclei divide
-chromosomes separate
creating 4
haploid gametes
whose chromosomes aren’t identical

Question 25

what makes meisos produce daughter cells which are genetically vaired?

Answer 25

prophase1:
non-sister chromosomes join up and trade sections

Question 26

mitosis vs meisos:

number of divisions?

Answer 26

MIT: 1

MEI: 2

Question 27

mitosis vs meisos:

where does it occur?

Answer 27

MIT: all over body

MEI: sex organs

Question 28

mitosis vs meisos:

creates (cells)…??

Answer 28

MIT: all cells apart from gametes

MEI: only gametes

Question 29

mitosis vs meisos:

number of chromosomes in each cell…???

Answer 29

MIT: 46 (diploid)

MEI: 23 (haploid)

Question 30

mitosis vs meisos:

produces number of cells…?

Answer 30

MIT: 2

MEI: 4

Question 31

mitosis vs meisos:

function??

Answer 31

MIT: asexual reproduction, growth, repair of tissue

MEI: sexual reproduction

Question 32

mitosis vs meisos:

gives daughter nuclei w/ chromosomes that are…??

Answer 32

MIT: genetically identical

MEI: genetically varied