A normal zygote has 23 of what?

A normal zygote has 23 pairs of chromosomes, which are homologous.

Explanation:

Meiosis is the sexual reproduction method used, which has sex cells like sperm and eggs. This creates four daughter cells with half as many chromosomes.

With each of the gametes created by the process of meiosis, it will have one pair from each of the homologous chromosomes. When both of the gametes meet during the fertilization stage, the zygote will have 23 pairs of chromosomes.

While this is the normal amount a human has, things can happen that can mess up the cell division stage and add an extra chromosome.

prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s

metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.

anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.

telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.