L13- Mitosis

Question 1

interphase is the

Answer 1

longest part of the cell cycle

Question 2

what happens in interphase

Answer 2

cell grows and copies its organelles and DNA

Question 3

mitosis simple

Answer 3

chromosomes align, separate and move into new daughter cells

Question 4

M

Answer 4

cell division

Question 5

G1

Answer 5

the cell grows, organelles are copied, mRNA and proteins synthesised in preparation for subsequent steps leading to mitosis

Question 6

S

Answer 6

DNA replication

Question 7

G2

Answer 7

= Organelle replication and reorganisation in preparation for mitosis

Question 8

unreplicated chromosome structure

Answer 8

one chromosome (one chromatid)= one DNA molecule

Question 9

replicated chromosome structure

Answer 9

one chromosome (two chromatids)= two DNA (identical) molecules

Question 10

centromere links the

Answer 10

sister chromatids and consists of repetitive sequences

Question 11

chromosome scan be grouped according to

Answer 11

size and shape

Question 12

how many chrosmsoems in human cell

Answer 12

46

Question 13

telomeres are

Answer 13

repetitive sequences at the end of each chromssomes

Question 14

homologous chromosomes

Answer 14

have the same DNA sequences- the same genes

Question 15

genes on homologous chromosomes may bey

Answer 15

different variants- alleles

Question 16

mitosis is

Answer 16

cell division for somatic cells

Question 17

mitosis produces

Answer 17

two identical daughter cells (same number of chromosome content as parental cell)

Question 18

how many mitotic rounds during development

Answer 18

50

Question 19

order of mitosis

Answer 19

Interphase
prophase
pro metaphase
metaphase
anaphase
telophase
cytokinesis

Question 20

prophase

Answer 20

• Nuclear envelop disintegrates
• Chromosomes condense
• Mitotic spindle starts to forms

Question 21

prometaphased

Answer 21

Spindles formed which connect to the kinetochore

Question 22

metaphase

Answer 22

• Chromosomes randomly line up at the metaphase plate

Question 23

Anaphase

Answer 23

• Kinetochore microtubules contract chromatids towards the poles
• Go to different poles (now become chromosomes (not called chromatids anymore)

Question 24

telophase

Answer 24

• Spindle disappears
• Nuclear membrane reforms
• Nucleolus reappears
• Chromosomes decondense

Question 25

cytokinesis

Answer 25

Cleavage of daughter cells with equal number of chromosomes