In this lab you will:
|Look around your house (or lab) and find materials that could be used to demonstrate how DNA replicates (pipe cleaners, beads, buttons, etc). Use these to demonstrate physically to a person of your choice while explaining the sequence that the enzymes are used and the function of each enzyme. The combination of "doing" while "talking" is a learning trick that helps cements the information more firmly into memory.|
|Take a picture of each step of your "setup", label and put this in your wikibook with an explanation of what is happening. (5 PICTURES)|
|The Enzymes of DNA Replication
4. DNA polymerase (III- major polymerase)
|GO HERE TO DO A JAVA ON DNA REPLICATION|
any materials at hand to demonstrate this like you did the DNA replication
above. The cut pipe stem cleaners or soda straws can be used, or cut paper.
This doesnt need to be complex. (2) sets of 2 different colored short papers is all that is needed. One color for the "old" DNA, 1 color for the "new" DNA.
Lay out the 2N-4N-2N and 2N-4N-2N-1N arrangements, take pictures and put in your lab wikibook. (2)
|Mitosis is the division of somatic
cells. DNA replicates or doubles right before division takes place.
Humans have 23 different chromosomes numbered 1 - 22 and the 23rd
is the X and Y chromosome. There are 2 copies per cell making the number
of chromosomes = 46 or 2N. Even tho the X and Y don't look alike,
they share most of the same genes and are in fact a pair. Chromosomes
come in different lengths the placement of the centromere is not necessarily
in the middle. Once the DNA is replicated the 2 chromatids (copies)
are attached at the centromere until pulled apart as the cell divides.
Do a search on youtube for a good example of mitosis. LINK TO IT FROM YOUR WIKI PAGE
|Meiosis is the division of gametic
cells, eggs and sperm. There are two important differences in meiosis.
1. The first occurs after DNA is duplicated to the 4N number. Both pairs of chromosomes (4N) line up and crossing over occurs, there is an actual exchange of chromosomal material.
2. The second occurs after the first cell
division to the 2N number there is another division to 1N number.
These cells are now ready to be fused with another gametic cell in fertilization
and reconstitution into the 2N or normal number.
Do a search on youtube for a good example of meiosis. LINK TO IT FROM YOUR WIKI PAGE