'Heterochromatin' diaporamas de présentation

EPIGENETIKA MB150P85

874 views • 59 slides

Heinrich Wilhelm Gottfried Waldeyer 1888

Heinrich Wilhelm Gottfried Waldeyer 1888. What is so special about chromosomes ?. 1.They are huge: One bp = 600 dalton, an average chromosome is 10 7 bp long = 10 9 - 10 10 dalton ! (for comparison a protein of 3x10 5 is considered very big. What is so special about chromosomes ?.

1.37k views • 46 slides

Office hr:5-6 Thr Geisel S&E

1. http://www.biology.ucsd/classes/bicd110.SP07/. Works for everyone?. Office hr:5-6 Thr. Office hr:10-11am Wed ROMA cafe. Office hr:5-6 Thr Geisel S&E. 2. A cell is an organism or a unit of a multi-cellular organism. 3. 4. Lecture 1 Genetic Information and the Cell Nucleus. 5. 6. 7.

526 views • 44 slides

Designs in DNA

436 views • 35 slides

Heterochromatin

Heterochromatin. Darkly stained and condensed. Transcriptionally silent and silences adjacent genes. Present at centromeres and telomeres. HP1 interacts with H3 only when K9 is methylated. Repressive structure can be propagated. Euchromatic gene placed in heterochromatin is repressed.

495 views • 27 slides

Heterochromatin

Heterochromatin. Darkly stained and condensed. Transcriptionally silent and silences adjacent genes. Present at centromeres and telomeres. HP1 interacts with H3 only when K9 is methylated. Repressive structure can be propagated. Euchromatic gene placed in heterochromatin is repressed.

456 views • 26 slides

Heterochromatin

Heterochromatin. Darkly stained and condensed. Transcriptionally silent and silences adjacent genes. Present at centromeres and telomeres. HP1 interacts with H3 only when K9 is methylated. Repressive structure can be propagated. Euchromatic gene placed in heterochromatin is repressed.

567 views • 26 slides

Heterochromatin

Heterochromatin. Darkly stained and condensed. Transcriptionally silent and silences adjacent genes. Present at centromeres and telomeres. HP1 interacts with H3 only when K9 is methylated. Repressive structure can be propagated. Euchromatic gene placed in heterochromatin is repressed.

393 views • 26 slides

Heterochromatin

Heterochromatin. Darkly stained and condensed. Transcriptionally silent and silences adjacent genes. Present at centromeres and telomeres. HP1 interacts with H3 only when K9 is methylated. Repressive structure can be propagated. Euchromatic gene placed in heterochromatin is repressed.

266 views • 26 slides

Chromosomes

Chromosomes. Human Genome Basics. Most human cells are diploid , having 2 copies of each chromosome, one from each parent. The gametes , sperm and egg, are haploid , with 1 copy of each chromosome.

1.17k views • 25 slides

MATTERS OF SEX

MATTERS OF SEX. Anueploidy having too many or too few chromosomes compared to a normal genotype Monosomy Possessing only 1 copy of any particular chromosomes Monosomy, with the exception of the X chromosome is incompatable with life. X chromosome dosage.

658 views • 25 slides

Epigenetic mechanisms of gene regulation

Epigenetic mechanisms of gene regulation. Chromatin structure Slows transcription Hypercondensation stops transcription Position effect variegation X inactivation Inactivation of one X chromosome in female mammals Genomic imprinting

676 views • 16 slides

Bellwork

Bellwork. Put these terms in order from earliest stage to latest stage: a dult juvenile embryo zygote fetus How are the cells that divide early on (right after sperm meets egg) different than most of the cells in your juvenile body?

222 views • 11 slides