lecture_1 - Lecture 1 Glossary for lecture 1 Genome: The...

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Lecture 1 Glossary for lecture 1 Genome : The set of chromosomes indispensable for functioning of a cell Cytogenetics: One of the sub-disciplines of genetics. Cytogenetics (a combination of cytology and genetics) deals with the chromosomal basis of inheritance. Amniocentesis: A technique of extracting fetal cell from the amniotic fluid. The cells are cultured and used to determine the karyotype of the fetus. Karyotype: The set of chromosomes present in a cell. Constitutive heterochromatin : Chromatin that is always present as a heterochromatin and is always genetically inert. Constitutive heterochromatin reflects the presence of specific DNA sequences (tandem repeats) in a chromosome region. Facultative heterochromain: It is euchromatin that in specific situations is converted into heterochromatin. Such chromatin can therefore exist in two states: euchromatic (being genetically active) and heterochromatic (being genetically inert). The best example of facultative heterochromatin is the X chromosome of the mammalian female. One of the two X chromosomes is inactivated by being converted into facultative
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This note was uploaded on 09/29/2009 for the course NPB NPB 101 taught by Professor Weidner/wingfield during the Spring '08 term at UC Davis.

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lecture_1 - Lecture 1 Glossary for lecture 1 Genome: The...

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