Chapter 8 GEnetics review .docx

Chapter 8 GEnetics review .docx - Know how to identify and...

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Know how to identify and define chromosome mutations: Deletion - mutation in which a section of DNA is lost, or deleted. Deletion of centromere, results in an acentric chromosome; Duplication - mutation in which a section of DNA is duplicated and both copies end up in the same chromosomes. Can occur because of an error during the duplication process of form an error during meiosis Inversion- mutation in which a section of DNA is put in backwards. Translocation : in which two non-homologous chromosomes exchange sections of DNA Aneuploidy: when one or more chromosomes are either lost or added to the normal set of chromosomes. Result of non-disjunction, either mitotic or meiotic Polyploidy : 3 or more sets of chromosomes (can reproduce sexually and axesually ) Haploidy: Usually lethal because of the presence of recessive lethal mutations that will act as dominant characteristics in the haploid state Monoploidy : only one set of chromosomes Diploidy : Normal: 2 sets of chromosomes What is cytogenetics and how is it performed?
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