'Xist' diaporamas de présentation

EPIGENETIKA MB150P85

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????????? ?????? ????? ???? 13.11.08 -

????????? ?????? ????? ???? 13.11.08 -. SRY gene. Sex determining factor (TDF) Intronless gene which initiates male sex determination Transcription factor (HMG-box family of DNA proteins) Mutations in SRY give rise to XY females with gondal dysgenesis

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Imprinting

Imprinting. Expression of only one allele of a locus. Only ~100 genes in mammals are imprinted. Parthenogenesis is not possible in mammals due to incorrect expression of imprinted genes. Most imprinted genes are involved in growth control or postnatal behavior.

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Imprinting

Imprinting. Expression of only one allele of a locus. Only ~100 genes in mammals are imprinted. Parthenogenesis is not possible in mammals due to incorrect expression of imprinted genes. Most imprinted genes are involved in growth control or postnatal behavior.

329 views • 32 slides

Imprinting

Imprinting. Expression of only one allele of a locus. Only ~100 genes in mammals are imprinted. Parthenogenesis is not possible in mammals due to incorrect expression of imprinted genes. Most imprinted genes are involved in growth control or postnatal behavior.

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X-inactivation

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2003 Silver Fleece Awards

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Summer 2007 Workshop in Biology and Multimedia for High School Teachers

Summer 2007 Workshop in Biology and Multimedia for High School Teachers. Barr Body: X Chromosome Inactivation. By: E.A. Struzziero. http://faculty.uca.edu/~johnc/Barr%20Body%20Cat.jpg. Murray L. Barr and E. G. Bertram ? 1949 ? Dark, drumstick-shaped masses in nuclei of nerve cells

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The Xist RNA Gene Evolved in Eutherians by Pseudogenization of a Protein-Coding Gene

The Xist RNA Gene Evolved in Eutherians by Pseudogenization of a Protein-Coding Gene. Duret et al. (2006). Background. Gene dosage is compensated by X-chromosome inactivation (XCI) In eutherians, XCI involves the Xist gene and the X inactivation center ( Xic )

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