Sites that are not unique. 1  Aggregators/ collections. 2  Something everyone on the internet already knows about (e.g., Netflix, Khan Academy, etc.) 3  Something not unique (includes generators, blogs, tumblrs, etc.) 4  Web games. Post to /r/webgames instead.  Articles or videos.
For example, cells in the human body have 46 chromosomes in total (this includes two sex chromosomes; XX for women and XY for men). However, human sperm and egg cells produced through meiosis only have 23 chromosomes. âMeiosis is reductional,â said M. Andrew Hoyt, a professor of biology at Johns Hopkins University. Meiosis produces daughter cells that have half the number of chromosomes as the parent cell. Thus, when fertilization occurs, the chromosome number is restored. For example, when the human sperm and egg combine during fertilization, they produce a zygote, a cell with 46 chromosomes.
The cells from each parent that combine to form the zygote are called gametes. In humans, the male gamete is called sperm, and the female gamete is called an egg. When the gametes join they form a cell called a zygote.he type of cell division that produces gametes with half the normal chromosome number is called meiosis. It is used to produce cells for repair and asexual reproduction. Gametes contain different genetic information to each other and to the parent cell. Meiosis is responsible for causing genetic variation.