AP BIOLOGY

CELL DIVISION

CELL DIVISION AND CANCEROUS CELLS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which type of cell division involves ripping “double” chromosomes into “single” chromosomes?
A
Mitosis
B
Meiosis
C
Both
D
Neither
Explanation: 

Detailed explanation-1: -Mitosis separates these chromatids, so that each new cell has a copy of every chromosome. The copied chromosomes consist of two chromatids joined at the centromere. The process of mitosis involves a number of different stages.

Detailed explanation-2: -To put that another way, meiosis in humans is a division process that takes us from a diploid cell-one with two sets of chromosomes-to haploid cells-ones with a single set of chromosomes. In humans, the haploid cells made in meiosis are sperm and eggs.

Detailed explanation-3: -facts What is meiosis? Meiosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information. These cells are our sex cells – sperm in males, eggs in females.

Detailed explanation-4: -We now know that most chromosomes contain a single molecule of double-stranded DNA that form a complex with proteins. This arrangement allows very long DNA molecules to be compacted into a small volume that can more easily be moved during mitosis and meiosis (Fig 2.1) and expressed during interphase.

Detailed explanation-5: -Mitosis results in two nuclei that are identical to the original nucleus. Meiosis, on the other hand, results in four nuclei, each having half the number of chromosomes of the original cell. In animals, meiosis only occurs in the cells that give rise to the sex cells (gametes), i.e., the egg and the sperm.

There is 1 question to complete.