(Nondisjunction diagram ) LAB CLONING
I. Chromosome Forms
II. CELL
CYCLE
- Interphase (G1, S, G2) and M phase (Mitosis and Cytokinesis)
A. INTERPHASE
1. G-1 Cell growth occurs
2. S- Chromosomes replicate during this phase.
3. G-2 More cell growth occurs
4. G-o phase- cells in this phase do not reproduce; most cells of the
human body are in this phase.
B. M
Phase (Animation)
(3-D
Animation_)
a. Cytokinesis- division of the cytoplasm
b. MITOSIS
- division of the nucleus (Animation
with Explanation)
Prophase-
includes a photograph with explanation
1. Centrioles move to opposite sides-- in animal cells
2. Nuclear membrane and nucleolus disintegrate
3. Chromosomes have doubled (in interphase) and formed chromatids
4. At the very end of prophase, the spindle forms
Metaphase-
includes a photograph with explanation
1. Centromeres, which hold the chromatids together, attach to spindle
fibers
2. Chromatids line up across the equator of the cell
Anaphase-
includes a photograph with explanation
1. Centromeres double and the chromatids-- now chromosomes-- move to
opposite sides of the cell
2. Cell begins to split: a furrow forms in animal cells; a cell
plate forms in plant cells
Telophase-
includes a photograph with explanation
1. The nuclear membrane re-forms around the chromosomes
2. The nucleolus reforms
3. The cell splits into two cells
Cytokinesis
Mitosis
Animation- EXCELLENT
Diagram
and explanation (This is a good diagram, but it takes a while
to download.)
III. MEIOSIS
--- (Animation) (Another
Animation, but this has an Explanation)
Spermatogenesis and Oogenesis
Cellular
Processes: Meiosis-- includes explanations and some diagrams
Meiosis-
diagram
MEIOSIS I
MEIOSIS II
Meiosis
Animation- Very Good
Frog
Oogenesis (Includes a Quicktime movie)
Dolly-
The first cloned sheep, died from premature aging.
RETURN TO MRS. PELLEGRINI'S BIOLOGY HOMEPAGE
©1998 Linda Pellegrini. All rights reserved.
