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.
Human cells contain 23 pairs of chromosomes for a total of 46. There are 22 pairs of autosomes and one pair of sex chromosomes. The sex chromosomes are the X chromosome and the Y chromosome.Sex Chromosomes: In human sexual reproduction, two distinct gametes fuse to form a zygote.Gametes are reproductive cells produced by a type of cell division called meiosis.he sex chromosomes are the X chromosome and the Y chromosome. Sex Chromosomes: In human sexual reproduction, two distinct gametes fuse to form a zygote. Gametes are reproductive cells produced by a type of cell division called meiosis.