How many chromosomes are in half of a sperm

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Meiosis and the Formation of Eggs and Sperm March 1, Readings: Meiosis: Ch 9: p --Figure 9. Just like everyone else

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This page has been archived and is no longer updated. Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. This process is required to produce egg and sperm cells for sexual reproduction.

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Sex chromosomeeither 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 comprise one pair of the total of 23 pairs of chromosomes.

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Human cells normally contain 23 pairs of chromosomes, for a total of 46 chromosomes in each cell. A change in the number of chromosomes can cause problems with growth, development, and function of the body's systems. These changes can occur during the formation of reproductive cells eggs and spermin early fetal development, or in any cell after birth. A gain or loss of chromosomes from the normal 46 is called aneuploidy.

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Chromosome abnormalities can be numerical or structural. A numerical abnormality mean an individual is either missing one of the chromosomes from a pair or has more than two chromosomes instead of a pair. A structural abnormality means the chromosome's structure has been altered in one of several ways.

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This page has been archived and is no longer updated. Haploid describes a cell that contains a single set of chromosomes. The term haploid can also refer to the number of chromosomes in egg or sperm cells, which are also called gametes.

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It causes many traits and problems. Girls with TS are shorter than most girls. They may also have other health problems such as heart or kidney problems.

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Chromosomes are stick-shaped structures in the middle of each cell in the body. Each cell has 46 chromosomes grouped in 23 pairs. When a chromosome is abnormal, it can cause health problems in the body.

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During meiosis, genetic information is exchanged between the maternally and paternally inherited copies of a pair of chromosomes in order to create new combinations of genes. This process of genetic recombination helps to increase genetic variability within a species. It allows for the transmission of virtually limitless combinations of genes from parent to offspring.

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Sperm and eggs are gametes. These cells are involved in sexual reproduction. During fertilization one sperm fuses with one egg to produce a new cell called a zygote. The zygote then divides through mitosis to produce an entire organism.

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