Question

		prophase II
		anaphase
		metaphase I
		anaphase I

In humans, the haploid number, n, equals

	A.	23.
	B.	44.
	C.	46.
	D.	3n.
	E.	2n.

How do mitosis and meiosis differ from each other?

		The goal of mitosis is to produce cells that are genetically identical to the original parent cell; the goal of meiosis is to produce cells that contain twice the number of chromosomes as the original parent cell.
		The cells formed by mitosis are diploid; the cells formed by meiosis are haploid.
		Mitosis results in the production of gametes; meiosis results in the production of cells, which are used for the organism's growth and replacement of damaged cells.
		Synapsis and crossing over occur in mitosis to ensure new combinations of genetic material; synapsis and crossing over do not occur in meiosis.

Polar bodies are unique products of ________.

		cytokinesis
		oogenesis
		mitosis
		spermatogenesis

Answer 1

1. The haploid number is the n number of chromosomes in a cell. A diploid cell is 2n and has 46 chromosomes. So the haploid cell will have 23 chromosomes.

The answer is A.

2. The mitosis produces the diploid cell with the same number of chromosomes while the meiosis produces the haploid cell with half the number of chromosomes.

The answer is B.

3. The polar bodies are the small cells that are cut off from the oocute cell during the oogenesis. These ultimately degenerate.

The answer is B.