1. Mitosis
During interphase, the DNA is not condensed and individual chromosomes cannot be discerned
As the cell enters prophase, the chromosomes condense
After DNA replication in S phase, each chromosome has two DNA molecules, known as sister chromatids
Until they are separated during anaphase, the chromatids are held together at a region called the centromere

4. Vocabulary Checkpoint
Chromosomes: in Eukaryotes, a structure composed of DNA and proteins that bares part of the genetic information of the cell
Chromatid: one of two identical chromosomal strands into which a chromosome splits longitudinally preparatory to cell division.
Sister Chromatids: each pair of newly replicated chromatids
Centromere: the region where sister chromatids join
Spindle: array of microtubules emanating from both poles of a dividing cell during mitosis
Centriole: a paired organelle that helps organize the microtubules during cell division

7. Prophase

10. Metaphase

13. Anaphase

16. Telophase