Mitosis And Miosis

Question 1

What happens in S phase

Answer 1

The chromosomes of the cell are copied

Question 2

What happens in G2

Answer 2

The cell grows in preparation for cell division

Question 3

What happens in cytokinesis

Answer 3

A single cell is divided into two identical daughter cells whenever the cytoplasm is divided

Question 4

What is mitosis

Answer 4

A process in which a eukaryotic cell separates it’s already duplicated chromosomes into two sets of chromosomes so there will be two identical nuclei

Question 5

What happens in prophase

Answer 5

The DNA molecules are shortened and condensed to form visible chromosomes. Enzymes break down the nuclear membrane and nucleolus so they are no longer visible. Lastly spindle fibers form

Question 6

What happens in metaphase

Answer 6

The spindle fibers attach themselves to the centromeres of the chromosomes and align the chromosomes at the equator

Question 7

What happens in anaphase

Answer 7

The spindle fibers shorten and the centromere splits separating the two sister chromatids.

Question 8

What happens in telophase

Answer 8

Chromatids are pulled to the opposite poles of the cell. The nuclear envelope and nucleolus reform before the chromosomes uncoil and then the spindle fibers disintegrate

Question 9

What happens in prophase 1

Answer 9

The chromosomes pair up so the chromosomes in each pair are homologous. Then crossing over occurs. After that the nuclear membrane starts to break down and the spindle microtubules stretch out from each pole to the equator

Question 10

What happens in metaphase 1

Answer 10

The paired up homologous chromosomes line up at the equator and the spindle fibers attach to the chromosomes

Question 11

What happens in anaphase 1

Answer 11

The homologous chromosomes are separated and pulled to opposite poles. The cell membrane starts to prepare for its separation at the equator to form two cells

Question 12

What happens in telophase 1

Answer 12

Each chromosome from the homologous pair are found at opposite poles and the nuclear membrane reforms around each daughter nucleus. The membrane then divides through cytokinesis

Question 13

What happens in prophase 2

Answer 13

The spindle microtubules stretch out from each pole again and the nuclear membrane breaks down

Question 14

What happens in metaphase two

Answer 14

The chromosomes in each cell line up at the equator and the spindle microtubules attach to the centromere of each chromosome

Question 15

What happens in anaphase 2

Answer 15

The centromere devised as a result of the spindle microtubules pulling each sister chromatid to opposite poles in both cells. Each sister chromatid then becomes a chromosome

Question 16

What happens in telophase 2

Answer 16

The nuclear membrane reforms around the four sets of daughter chromosomes. Cytokinesis then follows to divide the cytoplasm of the two cells and so the result is four daughter cells with a haploid set of chromosomes

Question 17

What happens in G1

Answer 17

The cell creates organelles and begins metabolism