chap 6 - cell division

Question 1

what is karyokinesis

Answer 1

involves the division of the nucleus

Question 2

what is cytokinesis

Answer 2

involves the division of thr cytoplasm

Question 3

what are organism’s body cells divided to

Answer 3

reproductive cells

somatic cells

Question 4

explain somatic cells 3m

Answer 4

body cells apart from gametes

are produced through mitosis

contains a diploid number of chromosomes / 2n = 46

Question 5

explain gametes 3m

Answer 5

are reproductive cells

produced through meiosis process

contains a haploid number of chromosomes / n = 23

Question 6

what is the cell cycle

Answer 6

the sequence of events that involves DNA multiplication and cell division to produce two daughter cells

Question 7

what does the cell cycle consist of

Answer 7

interphase and m phase

Question 8

what happens at the g1 stage

Answer 8

cells grow

cell components such as mitochondrion and endoplasmic reticulum are produced

protein used are also synthesised

the nucleus looks big and the chromosome is in the form of chromatin

Question 9

what happens at the S phase

Answer 9

DNA synthesis occurs

the DNA in the nucleus is replicated

each chromosome is multiplied into two identical chromosome known as sister chromatids

both chromatids contain the same copy of DNA molecule, both are joined at the centrometre