Stages Of Mistosis

Question 1

Describe the overall process of Interphase

Answer 1

Cell is enlarged
organelles are duplicated
DNA is stored in nucleus

Question 2

Prophase

Answer 2

-Centrosomes form, consisting of two identical sister chromotids, joint at centromere
-Chromosomes move to opposite poles of cell
-Nuclear envelope broken down
-Centromere forms spinal fibres

Question 3

Metaphase

Answer 3

-Spindle fibres connect to centromeres
-spinal fibres shorten, chromosomes are lined up on equator of cell

Question 4

Anaphase

Answer 4

-Spinal fibres contract more so chromotids are separated from centromere
-Chromotids now considered chromosomes
-chromosomes move to opposite poles of cell

Question 5

Telophase

Answer 5

-spindle fibres dissolve
-chromosomes decondence (no longer visible on light microscope)
-nuclear membrane reforms around each set of chromosomes

Question 6

Describe cytokinesis in animal cells

Answer 6

‘Cleavage furrow’ forms and separates cell

Question 7

Cytokinesis in plant cell

Answer 7

‘Cell plate’ forms and lays ground work for new cell wall to form, dividing cell

Question 8

What is a centromere

Answer 8

Where two chromatids are joint

Question 9

What is a centrosome

Answer 9

Organelle which forms sounds spindal fibres