bio

Question 1

what happens in prophase

Answer 1

-The nuclear membrane breaks down -the chromatin turns into chromosomes
-The centrioles move to opposite side

Question 2

what happens in metaphase

Answer 2

• Spindle fibers extend and connect to the chromosomes at the centromere
  -chromosomes are lined on the equator
  -Longest phase

Question 3

what happens in anaphase

Answer 3

-Sister chromatids are pulled apart to opposite sides of the cell
-shortest phase

Question 4

what happens in telophase

Answer 4

-Two nuclear membranes reforms
-Cell starts to divide at cleavage furrow

Question 5

what happens in Cytokinesis

Answer 5

-Chromosomes go back to chromatain
-the rest of the cell splits into two identical daughter cells.

Question 6

what happens in the G1 phase

Answer 6

-cell is growing
-getting larger

Question 7

what happens in the Synthesis phase

Answer 7

-DNA is duplicated meaning it makes an exact copy of all its chromosomes.

Question 8

what happens in the G2 phase

Answer 8

-growth
-checking to make sure cell is ready to divide

Question 9

3 steps in interphase

Answer 9

1. G1- growth
2. Synthesis- DNA replication
3. G2- prep for mitosis

Question 10

why do cells divide

Answer 10

1. Growth: to increase amount of cells in the body
2. Repair: to replace dead, old or damaged cells
3. Reproduction: can make exact clones (copy)

Question 11

Explain the difference between a chromosome and a chromatid.

Answer 11

Chromosome – duplicated DNA held together by a centromere
Chromatid – single copy of DNA