Why are sex cells (gametes) haploid instead of diploid. Write a brief.pdf

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Why are sex cells (gametes) haploid instead of diploid. Write a brief explanation/describe the what the consequences would be if gametes were diploid instead. Solution Sex cells (gametes) are haploid because they are formed by the process of reductional division called meiosis. Meiosis is a defined as double division of parent cell which results in the formation of 4 daughter cells each having half the number of chromsome than that of parent cell. It is the type of cell division in which chromosome number is reduced from diploid number (2n) to haploid number (n). This type of division is important while the formation of gametes as it maintains constant number of chromsomes generation after generation. If meiosis woulf not occur, gametes with diploid chromosome number will be produced and when these gametes will fuse to form zygote, the resulting zygote will have an abnormal ,double the number of chromosome (tetraploid) than that of the normal number of chromosome found in species. Tetraploidy is very lethal in animals , therefore meiosis is important in maintaining normal chromosome number..

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Aneuploidy is a type of chromosomal abnormality in which numbers of chromosomes are abnormal.Generally, the aneuploid chromosome set differs from wild type by only one or a small number of chromosomes. It is a genetic disorder causes birth defects. It is the second major category of chromosome mutations in which chromosome number is abnormal. Aneuploid nomenclature is based on the number of copies of the specific chromosome in the aneuploid state. For example, the aneuploid condition 2n − 1 is called monosomic (meaning “one chromosome”) because only one copy of some specific chromosome is present instead of the usual two found in its diploid progenitor. The aneuploid 2n + 1 is called trisomic,2n − 2 is nullisomic, and n + 1 is disomic.

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