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Occasionally chromosomal material is lost or rearranged during the formation of gametes or during cell division. This may be collect to translocation or nondisjunction. Cri du chat is integrity of the most common syndromes caused by chromosomal deletion, affecting between one in twenty-thousand and one in fifty-thousand children. Eighty-percent of children affected by the syndrome experience chromosome deletion that comes from their fathers sperm. When these deletions in the childs chromosomes occur during the formation of sperm or an egg, it is caused by an unequal recombination during meiosis. Recombination usually happens between pairs of chromosomes during meiosis while there be delineated up at the metaphase plate. If the pairs of chromosomes do not line up as they should, or if the chromosome breaks are not repaired appropriately, the social system of the chromosome may be altered. When unequal recombination happens at this location on chromosome five the result is Cri du chat syndrome.
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Cri du Chat Syndrome (CCS) was discovered in 1963 by Dr. Jerome Lejeune. CCS is an autosomal deletion syndrome caused by a transformation during schooling or in the formation of reproductive cells.
CCS is rarely inherited and affected individuals usually have no accounting of CCS in their family. The most common symptom is a falsetto cry that sounds like a cat, which is why the name heart Cats cry. The cry is caused by an abnormal development of a childs larynx when they have the syndrome, that ordinarily becomes noticeable as they become older, which can make it more than difficult for a doctor to diagnose Cri du chat past times the age of two. The syndrome is caused by a deletion on the wretched arm of chromosome five. A number of genes are missing out-of-pocket to the deletion, and each can contribute to the symptoms the child experiences. One of the deleted genes that is know to be involved is referred to as, TERT, or telomerase reverse...If you want to get a full essay, order it on our website: Orderessay
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