Mitosis and Meiosis

Question 1

Growth and Preparation of chromosomes for replication

Answer 1

Gap 1 (G1)

Question 2

Stage when DNA replication occurs

Answer 2

Synthesis (S)

Question 3

Preparation of mitosis

Answer 3

Gap 2 (G2)

Question 4

Chromosome separates

Answer 4

Nuclear division

Question 5

Cytokinesis

Answer 5

Cytoplasmic division

Question 6

Two basic types of cells

Answer 6

Somatic cells

Gametes

Question 7

General body cells

Answer 7

Somatic cells

Question 8

Sex cells

Answer 8

Gametes

Question 9

number of chromosomes in a human somatic cell

Answer 9

46 chromosomes

Question 10

the chromosomes are arranged in how many pairs

Answer 10

23

Question 11

how many individual chromosomes in sex cells

Answer 11

23 individual chromosomes

Question 12

Stages of Mitosis

Answer 12

Interphase
Prophase
Metaphase
Anaphase
Telophase

Question 13

Cells are not dividing

Answer 13

Interphase

Question 14

chromatin begins to coil and condense to form chromosomes

Answer 14

Prophase

Question 15

Spindle grows and forms attachments to the chromosomes at the centromeres

Answer 15

Metaphase

Question 16

Centromeres divide to create two chromosomes instead of a pair of attached chromatids

Answer 16

Anaphase

Question 17

Nuclear envelopes reassemble and surround each set of daughter chromosomes

Answer 17

Telophase

Question 18

Chromosomes are decondensed (called chromatin) and their information is available to the cell for synthesizing products

Answer 18

Interphase

Question 19

The nuclear envelope and nucleolus disappears

Answer 19

Prophase

Question 20

Chromosomes move to an equatorial plate (metaphase plate) which is formed along the midline of the cell between poles

Answer 20

Metaphase

Question 21

poles of the spindle apparatus are pushed apart as the cell elongates

Answer 21

Anaphase

Question 22

Nucleoli reappear inside the newly formed nuclei

Answer 22

Telophase

Question 23

Takes place only in the ovaries and testes

Answer 23

Meiosis

Question 24

Involves one duplication of the DNA and two cell divisions (Meiosis I and Meiosis II)

Answer 24

Meiosis

Question 25

A single cell divides into two

Answer 25

Meiosis I

Question 26

The two cells from meiosis I divides again

Answer 26

Meiosis II

Question 27

2 important processes that occur in Prophase I

Answer 27

Synapsis | Crossing over

Question 28

The coming together of two homologous chromosomes

Answer 28

Synapsis

Question 29

Segments of DNA from one chromatid in the tetrad pass to another chromatid in the tetrad

Answer 29

Crossing over

Question 30

subdivisions of Prophase I

Answer 30

``` Leptotene Zygotene Pachytene Diplotene Diakinesis ```

Question 31

Once ____ takes place, the cell is committed to meiosis

Answer 31

Leptotene

Question 32

Chromosomes appear threadlike

Answer 32

Zygotene

Question 33

Synapsis is complete during this stage

Answer 33

Pachytene

Question 34

Chromosomes continue to shorten and thicken

Answer 34

Diplotene

Question 35

Point at which crossing-over took place

Answer 35

Chiasmata

Question 36

Chromosomes reach their greatest contraction during this last stage of prophase

Answer 36

Diakinesis

Question 37

Characterized by disappearance of the nuclear membrane and formation of the meiotic spindle

Answer 37

Metaphase I

Question 38

Centromeres of each tetrad separate and migrate to opposite poles

Answer 38

Anaphase I

Question 39

The two haploid sets of chromosomes reach opposite poles and the cytoplasm divides

Answer 39

Telophase I

Question 40

Stages of Meiosis II

Answer 40

``` Interphase II Prophase II Metaphase II Anaphase II Telophase II ```

Question 41

No duplication of DNA

Answer 41

Interphase II

Question 42

The chromatin material condenses, and each chromosome contains two chromatids attached by the centromere

Answer 42

Prophase II

Question 43

The 23 chromosome pairs gather at the center of the cell prior to separation

Answer 43

Metaphase II

Question 44

The centromeres divide, and the 23 chromosome pairs (46 chromatids) divides

Answer 44

Anaphase II

Question 45

The chromosomes gather at the poles of the cells and become indistinct

Answer 45

Telophase II

Question 46

__1. homologous chromosomes independent | __2. homologous chromosome pair forming bivalents until anaphase I

Answer 46

Mitosis | Meiosis

Question 47

__1. Daughter cell haploids | __2. identical daughter cells

Answer 47

Meiosis | Mitosis

Question 48

__1. chromatids not identical, crossing over __2. identical daughter cells __3. daughter cells have new assortment of parental chromosomes

Answer 48

Meiosis Mitosis Meiosis