Forensic Online Activities

In the DNA fingerprinting activity It talked about how and what fingerprints are used for. Scientists and foresic investigators can use your fingerprints to find out who comitted a crime. It explained how they use enzimes to separate the DNa and then they use gel electrophoresis, through which you can see the strands of DNA.

In the second activity the Gel electrophoresis was explained more detailed. With the gel electrophersis you can determine if a person commited the crime if you have the DNA which was found one the crime scene. The activity also showed how there were waves of DNA and how they moved, through a animation.

In the Barcode activity, I concluded that the 4th suspect's DNA/barcode corresponded to the one that was found on the crime scene. All the Lines were excatly the same in both of the examples, and out of all 6 barcode which were suspects it was the one which looked the most like it belonged to the one found on the crime scene.

Is Dominace Always Dominant?

Dominace is not always dominant. It depends on what your testing. Certain plants always display dominace while others do not. We did an online lad to prove this. With Pea plants which mendel tested dominace was always expressed and that's how he came to that conclusion. The Pink flowers were dominant because when it was crossed with the white only pink flowers came out. Pea plants which we experimented with first show dominace and the color is dominated by the dominant allele when it was expressed. In the snapdragons example that came next, incomplete dominace was shown most of the colors randomly appeared. Incomplete dominace is a form of inheritance were the alle is not always dominant always the other one. I came up with this conclusion since when I crossed certain colors such as Red1 and White1 8 pinks came out which ment they both of them were reccesive and none of them were heterozygus The third example we tested were lentils, which were co-dominant. This means that both alelles in the gene pair are expressed equally, they are fighting for dominace. I concluded that because when the spots and dots were both dominant when they were crossed with each other, while with the spots and dots were not dominant.

In conclusion dominace is not always dominant, dominace is only dominant it depends on what you are testing. Pea plants are always dominant, while snapdragons show incomplete dominace and Lentils show co-dominace.

Current Event: Clash of the Crayfish

"Clash of the Crayfish: Why the Americans Are Winning." ScienceDaily. ScienceDaily, 15 Mar. 2012. Web. 16 Mar. 2012. .

I read about the problem that exists in Yorkshire, there crayfish are slowly being extinct since there is an invader, the American crayfish. Yorkshire is one of the last places were white-clawed crayfish live and now that's also endagered. Since there are new crayfish living with them(the american crayfish) which are much more resistant and which spread the porcelain disease. The local crayfish suffer from this disease since they're not as resistant. From the disease they slowly loose there appetiet and die a couple years later. The white-clawed crayfish are also much more picky about there food, then there American counterparts. The American crayfish is more aggresive than the local one. Scientists are studying the fish and still cannot figure out why the American one is more succesful one then the british one.

I found this article on the science daily site. I chose it since the title the clash of the crayfish was really intriguing and just that was enough to make me want to read this source since the title couldn't have sounded a lot more interesting. I think the science daily site is a trustworthy one since I use it for most of my current events. They always realese new articles and videos on almost all science topics.

I found this article really interesting, since it talked about an endagered specie and how all most the same animal from a different part of the world is more resistant and is expanding it's community while the other one is slowly dying out. This article made me think of how entire species of animals can die out and how people must do more to help them since it is within our power to help other animals.

Mitosis Questions

Part 1: Can you find dividing cells in the onion root tip?

Yes you can find dividing cell in a onion root tip. The best place for finding dividing cells in an onion root tip, is at the tip of the onion. This is because the tip of the onion root always grows and reproudces itself and repairs itself. Cells at the tip always reproduce
What differences can you see when you compare the nucleus of a dividing cell with that of a
non-dividing cell?

The dividing cell can be defined because you can see there is movement of parts of the cell.
The cell is undergoing the procces of mitosis were it separates. When you observe non-dividing cells nothing happens, while in a dividing cell the cell moves and parts get's ready for dividing reproducing and reparing.

Part 4: See what differences you can detect between the division of an animal cell and a plant cell.

The difference between the division of and animal and a plant cell are a bit different. Except the chromosomes in a animal cell undergo different phases of mitosis then plant cells. Animal cells seem to have a shorter mitosis procces than plants do. In the video I watched as soon as they finished the metaphase the animal cells split.

Mitosis Cells

Introduction: Find out the difference between Cytokinesis and Mitosis. How do they go together in order to complete the cell division process?

Part 1: Can you find dividing cells in the onion root tip?

Yes, you can find the dividing cells by finding were the most concentrated cells are, that's the easiest way to decide were the cells are. Dividing cells are in the most concentrated areas since some of them have been divided.

What differences can you see when you compare the nucleus of a dividing cell with that of a
non-dividing cell?

The difference between the nucleus of a dividing cell and a non-dviding cell, is that the dividing cell is going through the proccess of mitosis, the dividing cells can be through be different steps of mitosis. But the nucleus of a dividing cell is moving through the inside and in 24 hours it divide.

First Activity

In the first activity we learned what each procces of mitosis was like and what is each part of mitosis. We learned how many cells each cells contained. We also learned how much each of the stages/phases lasts. We also learned some facts about each phase of mitosis.

Second Activity

Through the second activity we got to see how the onion tip actually looks like and we got to see what divding cells look like when there being divided.

Make the Right Call lab

Analasis

1. For the first trial, when you crossed the B's and b's the result is always the same you get Bb. When you look at the punnet square all of the results are also Bb, which means the punnet square is correct and the results are always the same.

2. For the second trials when one bag contained one big B and small b, and the other bag was only big B's. In this experiment we had seven Bb's and three BB's, This was affected by chance. The punnet square predicts 50% for each.

3. During this third trial there were three different outcomes, one being Bb, the second bb, and the third BB. The punnet square predicted that we are going to have 50% Bb, 25% bb and 25 % of BB. Unlike the punnet square we got the most bb's, 6 out of the ten trials we did.

4. If you had more trials and instead of 10, 100 I would think this would be a more succesful experiment, since when you have a little trials, luck can take it's part but in a lot more, forecasted statistics are more likely to happen in a real life example.

5. The model compares whith a punnet square in a way that thre is the same chance and probability you will pull out a certain marble, but in a punnet square you have excatly a certain probabilty, while in the model even the less likely one might occur more times due to chance and luck.