I. A chromosome is a single DNA molecule complexed with histone proteins.
A. DNA is highly compacted: DNA + protein = nucleosome structure
Point: chromatin = DNA + histone proteins; coiling
B. By convention, numbering starts with the largest chromosome.
Point: Biggest (per microscopy) is first
C. Chromosome landmarks: Via light microscopy, with appropriate preparation, certain regions of the chromosome, are visible via light microscopy and have specific functions.
D. Heterochromatin and euchromatin: terms used to describe the compactness of DNA.
- Heterochromatin: _______________
- Euchromatin: _______________