Mitosis

Question 1

Prophase

Answer 1

the first phase of mitosis where visible chromosomes appear scattered through a cell; nuclear membrane dissolved; centrioles move to opposite poles, forming a spindle between them

Question 2

Metaphase

Answer 2

the second phase of mitosis where chromosomes line up at the equatorial plate (metaphase plate) and attach via centromeres to a spindle fibre. Each centromere replicates so each sister chromatid has its own spindle fibre to attach

Question 3

Anaphase

Answer 3

the third phase mitosis where spindle fibres contract, pulling sister chromatids of each chromosomes apart to opposite poles

Question 4

Telophase

Answer 4

the fourth phase of mitosis where nuclear membranes form around the two groups of chromosomes; spindle apparatus dissolves; chromosomes decondense to become chromatin

Question 5

Centrioles

Answer 5

organizing bodies of the spindle. As they move apart in prophase, spindle fibres stretch out between them, forming the spindle apparatus

Question 6

Kinetochore

Answer 6

another word for centromere; the small body holding the sister chromatids together as one chromosome; attaches to a spindle fibre at the metaphase plate

Question 7

Telomere

Answer 7

a section on each end of a chromosome that shortens with each mitotic division. If the telomere is too short, the cell no longer divides