Punnet square is a chart use to chart or put the genotypes of offsprings. It is used usually in science to find what the offspring will look like or have what traits from the parents. It is a square with four mini squares inside. In the mini square is were you chart the offsprings' genotype. 
     To do it you make the chart. First with a square and then a lower case t in the middle to make the four mini squares. Then put in the parents genotype for the trait you are looking for. Then do columns and rows. Next look at the first letter of the genotype in the first row and columns or columns and rows. For example, the genotype of the father is big G little g (Gg) which can be placed on the top of the punnet square or the left hand side of the square. Next the genotype of the mother is little g little g (gg), which can be paste in the extra spot of the father's genotype. 
     As you can see the first row and column is big G little g, or Gg because it came from the first letter of each parents. Now that will be placed on the first mini square. Next the mother's little g lines up with the little g on the right hand side of the father's. The second mini square is little g little g, (gg). Then the next row moving downward to the next letter is little g of the mother(Notice: only move if you did rows to columns). Also move to the second letter in the columns if you start with columns to rows if not leave it. Now do as the same as before, little g to big G. Of couse, sometimes it is written gG, but the correct way to write it is Gg, just switch it. Now put that in the third punnet square. Next the mothers second little g lines up with the second little g of the father. It is little g little g on the fourth one. Now your done!
     Solving a punnet square can be pretty complicated and confusing if you don't pay attention or listen closely, so pay attention! That was what I did so solving punnet square wasn't very hard for me.
 
     My class and I were assigned to make a structure of DNA out of beads. The first step was to get the materials which were a 34 inch wire, two blue and yellow long cylinder beads, two red and green short cylinder beads, two silver beads, and two gold beads. You may need more beads than this to finish the actual structure, this is only to make two sets. (Remember Do Not Pull the Wire), why, if you do pull it the wire forms what is called a kink(s) and with that the wire will form some circular things and that is called a kink. To undo anything from forming a kink; will look like a circle, but don't worry, easily work your way the wire through or turn the wire. 
     First put in a yellow bead in the wire then in the opposite side put in red bead. Next feed a white bead on each side of the wire. Then feed a gold bead through each side of the wire. Next feed the green bead through the wire with the yellow side and feed a blue bead through the wire with a red bead. Now make sure your beads are at the center of the wire. Afterwards, run the right side wire through the left side wire green and silver beads. And here do the same thing with the left wire, feed it through the first two beads. Again make sure the beads are at the center of the wire and gently pull the both of the wires and try to keep the first set in the middle. Now all you have to do is to repeat this step over and over again until you finish your beads. Next step, find the extra two wires and use a pair of pliers and gather the a few centimeters of wire into the plier and twist it a couple of time. Now stick each wire through the two rows of gold beads and when finish just cut the extra wire(if there's any). Now just give it a little bit of twist and it's ready. 
     This could represent a real DNA, but only more colorful. However, the colorfulness can be a big help of telling which part is which. 
 
     A topic that was very hard I learned last semester was the cell organelles. When I was first assign the work to do it, it took me all night long to figure out the answers to the problems. Even though I was looking in the book it was still very hard to find the answers because the stated clue were not exactly what it was in the book. 
     However, after a few times of doing it over and over again in assignments and having to do Brain Pop on it, I became good at it. One night, I studied all the cell organelles and then I it became some of the easyies lesson of science.