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But human sex cells have 23 unpaired chromosomes in each cell. Sex cells are created by a special type of cell division, meiosis. This pictures are showing, how sex cells (sperm and egg or ovum) are created by meiosis. Human diploid cells contain two sets of 23 chromosomes for a total of 46 chromosomes. When sex cells unite during fertilization, the haploid cells become a diploid cell. This process occurs continuously and takes place within the male testes. The haploid chromosome number is half the chromosome number of the body cells. In human haploid cells (sex cells), there are 23 chromosomes. This xy sex-determination system is found in most mammals as well as some reptiles and plants. The chromosomes found in our cells that are not sex chromosomes are termed? Autosomes. A period called occurs after telophase i and prior to phrophase ii. -the sex chromosomes are arranged together-they are ordered according to size-they are arranged in homologous pairs. Allosomes not only carry the genes that determine male and female traits, but also those for some other characteristics as well. Genes that are carried by either sex chromosome are said to be sex linked. Sex linked diseases are passed down through families through one of the x or y chromosomes. Since usually men inherit y chromosomes, they are the only ones to inherit y-linked traits. Men and women can get the x-linked ones since both inherit x chromosomes.

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