Biology 1002B Lecture Notes - Lecture 18: Hox Gene, Peptide, Blastula

27 views4 pages

Document Summary

Epigenetic = regulation that persists throughout generations or cell lines. Gene expression is inherited from parent cells; not determined by each daughter cell. 2 epigenetic mechanisms = feedback loops and chromatin packaging: feedback loops: product of a gene associates with its promoter; stimulates more of its own transcription. Important for differentiation/dedifferentiation of tissue types: chromatin packaging: densely packed histone-dna regions are called heterochromatin; most genes in these regions are silenced. Histones can be modified by acetylation, methylation, or phosphorylation. Different types of mutations in protein coding genes. Could have a snp that results in no change in the amino acid sequence. You can have much more variation in dna than what shows up in protein sequence; this is due to the redundancy in the genetic code. Could change dna that results in change in a single amino acid. Effect: improper folding of protein or could have no effect at all.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents