mitotic cell division

Question 1

A karyotype is..

Answer 1

a potrait formed by the number and shapes of chromosomes represented.

Question 2

Human chromosomes

Answer 2

• can be arranged into 22 pairs of chromosomes
• 1 pair of sex chromosomes

Question 3

Sex chromosomes

Answer 3

xx= girl
xy= boy

Question 4

Ploidy, Haploid, Diploid

Answer 4

Ploidy: the number of complete sets of a chromosomes in a cell
Diploid: two complete set
Haploid: one complete set

Question 5

sister chromatids

Answer 5

Two identical copies of chromosome

Question 6

Homoglous chromosome

Answer 6

Two identical pairs of the same chromosome

Question 7

1. Prophase

Answer 7

1. Mitotic spindle forms outside of the cell
2. The chromosomes get moved toward opposite sides of the cell
3. The centrosomes are at the center of the mitotic spindle
4. Microtubes form around the centrosome

Question 8

2. Prometaphase

Answer 8

Chromosomes attach to the mitotic spindle
1. The nuclear envelope breaks down
2. The microtube attach to the chromosomes
3. The chromosomes get attached to the centromere
4. Kinetochores coming from the sister chromatids get attached to the spindle microtube.

Question 9

3. Metaphase

Answer 9

Chromosomes align as a result of dynamic changes in the mitotic spindle
1. All of the chromosomes align in the center of the cell

Question 10

Anaphase

Answer 10

Sister chromatids fully separate
1. The centromeres split up the sister chromatids
2. The microtubules shorten their length span

Question 11

Telophase

Answer 11

Nuclear envelope reforms around the newly segregated chromosomes
1. The cell prepared for division
2. The mitotic Spindel breaks down and disappears
3. The nuclei becomes more condensed and less visible

Question 12

In animal cells cytokinesis happens by

Answer 12

a ring of actin filaments called contractile ring

Question 13

In plant cells cytokinesis happens by

Answer 13

a phragmoplast