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Organisms that reproduce sexually do so via the production of sex cells also called gametes. These cells are very different for the male and female of a species. In humans, male sex cells or spermatozoa (sperm cells), are relatively motile. Female sex cells, called ova or eggs, are non-motile and much larger in comparison to the male gamete. Sex cells are gametes or cells that have half the number of chromosomes that a normal body cell have. Did you know that we are made up of more than 200 different types of cells? Does that make you wonder how many cells are in the human body? And are all the cells in your body even human cells?   how many chromosomes do people have? In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46. Twenty-two of these pairs, called autosomes, look the same in both males and females.   gamete cells, also known as sex cells, are the cells responsible for sexual reproduction. A male gamete is called sperm (spermatozoa) and is a haploid cell formed through spermatogenesis. A female gamete is called an ova or egg cells (oocytes), which are haploid cells carrying one copy of each chromosome. Sex chromosome, either of a pair of chromosomes that determine whether an individual is male or female. The sex chromosomes of human beings and other mammals are designated by scientists as x and y. In humans the sex chromosomes consist of one pair of the total of 23 pairs of chromosomes. A germ cell is any biological cell that gives rise to the gametes of an organism that reproduces sexually. In many animals, the germ cells originate in the primitive streak and migrate via the gut of an embryo to the developing gonads. There, they undergo meiosis, followed by cellular differentiation into mature gametes, either eggs or sperm. What do we call a cellchromosome that only has 1 copy of every chromosome? Haploid or 1n. How many chromosome copies do human sex cellsgametes have? One copy of each chromosome - sex cellsgametes are haploid. What are sister chromatids? Sister chromatids are identical to each other. And females have sex with many males in a short span of time.

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