Ch 4 P II

Question 1

The non-dividing stage of the cell cycle

Answer 1

Interphase

Question 2

The division of genetic material

Answer 2

Mitosis

Question 3

The distribution of cytoplasm and formation of 2 identical cells

Answer 3

Cytokinesis

Question 4

The cell grows, carries out metabolic functions, duplicates its organelles

Answer 4

G1

Question 5

The replication of DNA occurs during

Answer 5

S phase

Question 6

A second gap during which the cell continues to grow and prepare

Answer 6

G2 phase

Question 7

A resting phase, for cells that have ceased dividing (e.g. neurones)

Answer 7

G0 phase

Question 8

The structure which attaches sister chromatids to each other

Answer 8

Centromere

Question 9

DNA doubles ……. mitosis

• Before
• After
• During

Answer 9

Before (during the S phase)

Question 10

The first phase of mitosis

Answer 10

Prophase

Question 11

Chromatin coils & condenses into visible chromosomes during

Answer 11

Prophase

Question 12

The nucleolus disappears during

Answer 12

Prophase

Question 13

The nuclear envelope disintegrates during

Answer 13

Prophase

Question 14

Centrioles migrate to opposite poles during

Answer 14

Prophase

Question 15

The structure composed of centrosomes and the their emerging microtubules

Answer 15

Mitotic spindle

Question 16

The nuclear envelope has fully disintegrated at

Answer 16

Pro-metaphase

Question 17

A protein structure on the centromere (point of attachment between spindles & chromatids)

Answer 17

Kinetochore

Question 18

Sister chromatids line up at the middle of the cell during

Answer 18

Metaphase

Question 19

The shortest phase in mitosis

Answer 19

Anaphase

Question 20

When are sister chromatids pulled apart, forming individual chromosomes

Answer 20

Anaphase

Question 21

The formation of 2 new daughter nuclei occurs in

Answer 21

Telophase

Question 22

Genetic material uncoils (decondenses) during

Answer 22

Telophase

Question 23

Nucleoli reappear during

Answer 23

Telophase

Question 24

Mitotic spindles break apart during

Answer 24

Telophase

Question 25

A contractile band made up of microfilaments

Answer 25

Cleavage furrow

Question 26

The nuclear division that forms haploid cells

Answer 26

Meiosis

Question 27

The starting cell in meiosis is

• Haploid
• Diploid

Answer 27

Diploid

Question 28

The final resulting cells of meiosis are

• Haploid
• Diploid

Answer 28

Haploid

Question 29

The major achievement in meiosis I

Answer 29

Reduction of number of chromosomes

Question 30

The genetic material is mixed during

Answer 30

Meiosis I

Question 31

The tight pairing of homologous chromosomes is called

Answer 31

Synapsis

Question 32

An exchange of chromosome segments that occurs during meiosis is called

Answer 32

Crossing over

Question 33

Crossing over is a source of

Answer 33

Genetic variation

Question 34

Homologous chromosomes are arranged in the centre of the cell during

Answer 34

Metaphase I

Question 35

The random orientation of homologous chromosomes during meiosis is called

Answer 35

Independent assortment

Question 36

The orientation of each tetrad is independent of the orientation of the order 22 tetrads
✅
❌

Answer 36

✅

Question 37

The ……… connections are broken in anaphase I

Answer 37

Chiasma

Question 38

Homologous chromosomes are pulled apart during

Answer 38

Anaphase I

Question 39

The physical separation of cytoplasmic components is called

Answer 39

Cytokinesis

Question 40

At the end of meiosis I are sister chromatids identical ?

Answer 40

No, due to crossing over

Question 41

Cells produced by mitosis are usually

Answer 41

Somatic cells

Question 42

Cells produced by meiosis are for

Answer 42

Sexual reproduction