1. Eukaryotic cells form chromosomes before cell division
Gene- segment of DNA that codes for a protein or RNA molecule.
Chromosome- DNA tightly coils up around proteins when preparing for cell division.
Chromatids- exact copies of DNA that make up each chromosome
Centromere- the two chromatids of a chromosome are attached here.
1 strand of DNA can be up to 5 feet long!

2. Chromosomes in the Larger Scheme

3. Chromosome Structure 1 – Chromatid 2 – Centromere 3 – Short arm
4 – Long arm

4. Chromosome

5. Chromosomes and Inheritance
10/27/2019
Chromosomes and Inheritance
A normal human male karyotype.
G. Podgorski, Biol 1010

6. The Y Chromosome Decides
Boy or Girl?
The Y Chromosome Decides
Y - Chromosome
X - Chromosome

7. The Cell Cycle (p. 244)

8. Prophase

9. Late Prophase
Chromosomes
Nucleus & Nucleolus have disintegrated

10. Metaphase

11. Anaphase
Sister Chromatids being separated

12. Anaphase

13. Telophase

14. Comparison of Anaphase & Telophase