168 Chapter 14 3. Prophase: This is when the DNA coils up and the chromosomes are now visible under the microscope. Each chromosome is now doubled, and consists of two absolutely identical...

Extracted text: 168 Chapter 14 3. Prophase: This is when the DNA coils up and the chromosomes are now visible under the microscope. Each chromosome is now doubled, and consists of two absolutely identical “chromatids." (A chromatid is the name for one of the duplicated DNA molecules that has coiled itself into a chromosome form and is attached to the other chromatid.) A2 A 4. Metaphase: The chromosomes (each consisting of two chromatids) line up end to end, in random order, along the midline of the cell. Spindle fibers have formed and are attached to the chromosomes. You will have to imagine fine threads attached to your beads. B1 B2 A2 5. Anaphase: The spindle fibers pull the duplicated chromatids apart and move them to opposite ends (poles) of the cell. 6. Telophase: Chromosomes are at opposite ends of the cell, and the cell divides into two cells. Notice that you started with a cell having two sets of chromosomes, and you ended with two cells, each having two sets of chromosomes. ? QUESTION 1. Are the two groups of chromosomes at telophase identical to the group of chromosomes you started with in interphase prior to DNA duplication? 2. Are the new cells identical to the original cells? 3. What is the name for this cell division process? 4. What kind of reproduction is it? 5. Is mitosis going on in your body right now? What kind of cells are you producing by this process? 6. Name two processes during which your body must reproduce cells by mitosis. a. b. 7. What do you think might be going on as you age (get wrinkles, grey hair, lose your hair, etc.)?