Mitosis and DNA Replication

Question 1

what is the role of helicase in terms of unwinding the double helix and separation of the strands?

Question 2

what is the role of DNA polymerase (in terms of formation of the new complementary strands) in the process of DNA replication?

Question 3

What are the the steps of Mitosis?

Answer 3

• interphase
• prophase: freely floating
• metaphase: chromosones meet up in middle in one line
• anaphas: cromatids pulled away from opposite sides of cell
• telophase: two identical diploid cells
• cytokienesus:

Question 4

what are the steps of interphase?

Answer 4

Interphase is a period of cell growth and normal activity. The DNA of the cell is also duplicated during this phase, creating two copies of each strand of DNA called a chromosome.

Question 5

What are the steps of phrophase?

Answer 5

Prophase is the first and longest stage. Chromosomes become visible and the centrioles separate and move to opposite poles of the cell.

Question 6

what are the steps in metaphase?

Answer 6

Metaphase is the second stage of mitosis. The chromosomes line up across the centre of the cell and become connected to the spindle fibre at their centromere.

Question 7

What are the steps in anaphase?

Answer 7

Anaphase is the third stage of mitosis. Sister chromatids are pulled apart and are separated into individual chromosomes.

Question 8

what are the steps in telophase?

Answer 8

Telophase is the fourth and last stage of mitosis. During this stage the chromosomes gather at
opposite ends of the cell and lose their distinct rod-like shapes. Two new nuclear membranes
form around each set of chromosomes and the spindle fibres disappear.

Question 9

what are the steps of cytokenesis?

Answer 9

Cytokinesis is the process that follows the last stage of mitosis. With two complete copies of the
DNA now in two different regions of one cell, the cell membrane will pinch and divide the
cytoplasm in half. The result is two individual cells that are identical to the original cell. Each of
the two new cells has a complete copy of the DNA and contains all of the organelles that the
original cell had.

Question 10

What are the the steps of Meiosis?

Question 11

A cell with diploid number of 20, undergoes mitosis. This will produce ____ daughter cells each with ______ chromosomes

Question 12

Crossing Overs during this Phase: _______

Question 13

tetrads line up along the equator during this phase:___________

Question 14

At the end of Meiosis I: _________ daughter cells are created. These daughters cells are _______

Question 15

Theses