Cell cycle, mitosis and meiosis

Question 1

cell cycle

Answer 1

a series of events that takes place in a cell as it grows and divides

Question 1

functions of cell division

Answer 1

reproduction
tissue renewal
development
growth

Question 2

what are the 3 events that take place?

Answer 2

1. duplication of the entire cellular material
2. distribution of the material between the 2 daughter cells
3. coordination of all of these events

Question 3

interphase

Answer 3

consists of
G1, S, G2 phase

Question 4

list the order of events in the cell cycle

Answer 4

G1
S
G2
Mitosis

Question 5

G1 phase

Answer 5

preparation

Question 6

S phase

Answer 6

DNA replication: process in which a molecule of DNA is duplicated

Question 7

stages of mitosis

Answer 7

prophase
metaphase
anaphase
telophase

Question 8

DNA replication

Answer 8

catalyzed by DNA polymerase. each of the strands of the parent molecule is used to synthesize a new strand on the new molecule. base pairing is at the base of DNA replication

Question 9

what does it mean that DNA replication is semiconservative?

Answer 9

new molecules are composed of one old strand and a new strand

Question 10

diploid

Answer 10

a cell or organism that has paired chromosomes- 23 pairs of chromosomes

Question 11

mitosis

Answer 11

division process in which the DNA of the cell’s nucleus is split into 2 equal sets of chromosomes

Question 12

draw the stages of mitosis

Answer 12

see notes

Question 13

who is the father of cytogenetics?

Answer 13

Flemming

Question 14

what happens after telophase?

Answer 14

cytokinesis happens giving rise to 2 diploid cells

Question 15

haploid

Answer 15

contain a single set of chromosomes

Question 16

meiosis

Answer 16

formation of gametes.

it is a way of increasing the genetic variability in the progeny

Question 17

outline the process of meiosis

Answer 17

diploid cells undergo DNA replication followed by 2 rounds of cell division, producing 4 haploid sex cells

Question 18

when does crossing over take place?

Answer 18

prophase 1

Question 19

crossing over

Answer 19

exchange of the genetic material between 2 homologous chromosomes

Question 20

how is genetic variability increased?

Answer 20

independent assortment of maternal and paternal homologs during meiotic division I

Question 21

what are the differences between meiosis and mitosis?

Answer 21

mitosis from one 2n cell forms 2n cells while in meiosis from one 2n cells 4 different n cells are formed

Question 22

draw the stages of meiosis

Answer 22

see notes