Unit 2.1b: Mitosis

Question 1

What is the process of a diploid cell dividing called?

Answer 1

Mitosis

Question 2

What organelle controls the process of a diploid cell dividing?

Answer 2

The nucleus

Question 3

During mitosis, what is produced?

Answer 3

Two identical daughter cells

Question 4

How many chromosomes does each daughter cell contain?

Answer 4

The same as the parent cell

Question 5

Why is it important that the two daughter cells have the same amount of chromosomes as the parent cell?

Answer 5

So that they maintain the diploid chromosome complement and so have the same genetic information.

Question 6

What does having the same genetic information allow the mother cell and the daughter cell to do?

Answer 6

The cells can both carry out the same functions as the parent cell

Question 7

What is the first stage of mitosis?

Answer 7

Nucleus contains long, uncoiled chromosomes which are difficult to see

Question 8

What is the second stage of mitosis?

Answer 8

Chromosomes make copies of themselves and become visible as pairs of identical chromatids

Question 9

What is the third stage of mitosis?

Answer 9

Chromosomes line up at the equator of the cell

Question 10

What is the fourth stage of mitosis?

Answer 10

Spindle fibres attach to chromosomes and pair of chromatids are pulled apart

Question 11

What is the fifth stage of mitosis?

Answer 11

Chromosomes move to opposite poles

Question 12

What is the sixth stage of mitosis?

Answer 12

Nuclear membrane forms and cytoplasm divides

Question 13

What is mitosis the process of?

Answer 13

The nucleus dividing into two daughter nuclei, each of which receives the same number of chromosomes that were present in the original nucleus.

Question 14

What happens after DNA replication in mitosis?

Answer 14

The copies of each chromosome are joined together by a centromere and each copy is called a chromatid

Question 15

_______ is the process by which the _______ divides into two daughter nuclei, each of which receives the same number of ____________ that were present in the original nucleus. After DNA ___________, the copies of each chromosome are joined together by a centromere and each copy is called a _______. The nuclear ________ disappears and _________ _________ form and attach to the centromere. The chromosomes move to the _______ of the cell. Next each _________ is separated and the resulting _________ move to the opposite ______ of the cell. The _________ ____________ reforms around each group of chromosomes and mitosis is complete.

Answer 15

Mitosis, nucleus, chromosomes, replication, chromatid, membrane, spindle fibres, equator, chromatid, chromosome, poles, nuclear membrane

Question 16

Why is it important for new cells produced to be identical the original cell?

Answer 16

This is important as it ensures that they have the same genetic information as the original cell and can therefore carry out the same functions.