Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Genes and Chromosomes DNA molecules are the largest
Document related concepts
Transcript
Genes and Chromosomes DNA molecules are the largest macromolecules in the cells and are commonly packed into structures called chromosomes. A single chromosome may carry thousand of genes Together, all of a cell’s gene and intergenic DNA (DNA between genes) is called GENOME Chromosome Genes introns – intervening sequences exons – coding sequences Eukaryotic chromosomes Supercoiling of DNA Plectonemic and solenoidal supercoiling Nucleosome = histone + DNA Nucleosomes are packed in 30nm fiber Loops of 30nm fiber attached to nuclear scaffold
