Patau's Syndrome

Patau's syndrome also known as trisomy 13 happens when there are 3 copies of genetic material from chromosome 13.
This syndrome occurs when extra DNA in trisomy 13 appears in body cells. The extra chromosome interfers with body development and other development.

The symptoms:

• Cleft lip of palate



• Clenched hands



• Extra fingers or toes



• Seizures



• Skeletal abnormalities (limbs)



• Scalp Defects (missing skin)



• Small Eyes



• Small head



• Small Lower jaw

There can be signs of congenital heart disease like for example the heart being on the right side of the chest instead of the left

The problems with is syndrome is that people get this syndrome at newborn stage. The complications are that it may cause deafness, heart failure, feeding problems, trouble breathing, and visions problems.

11/28

In class on 11-28-11. We started a NEW UNIT!! The new unit we are starting is about Meiosis, Genetics, and Genetic Technology. The way we started the new unit out was to compare and contrast Meiosis to Mitosis or review the phases of Meiosis (this was homework over thanksgiving break).

Today in class we took notes on Meiosis. Mrs. Stein asked us a question she said What is the goal of Meiosis? The goal of Meiosis is making the egg and sperm cell.

There are 23 pairs of homologous cells. In total there are 46. Each pair comes from your parents. Cells with a double set of chromosome are diploid (2n). Cells with one set of chromosomes are haploid (n). In Meiosis the chromosomes are haploiod. A haploid has half the number of chromosomes.

Where does Meiosis occur? Meiosis occurs in the ovary and testes.



Our body cells are diploid cells (2N) 2N=46 N=23


Gametes are sex cells and they are haploid. The fertilization restores the diploid state (N+N=2N).
Zygote is a fertilized egg (2N).

This is a picture of Meiosis I and Meiosis II.
In Meiosis I there is Prophase I, Metaphase I, Anaphase I and Telophase I. Then in Meiosis II the cells is formed a clevlege. The end result is Cytoskinesis and 4 cells are created. In this picture there is 2 cell divisions-Meiosis I and II.

The homework for today 11-28-11 was to read 11.4 with double bubble map or flow map (your choice).
Unit Packet 13-14-READ/COLOR/ANOTATE.

Next scribe is JessicaB :).

Today (10-25-11) in clase we handed in our Cancer paper stapled to our rubric. We also truned in the stampsheets and disscussed the lab we did yeterday. We started out the class talkng about What a virus is?

• made of proteins (caspids) and nucleic acid (genetic material): DNA/RNA



• NOT LIVING. Don't use energy, spread to forcing cells to make copies of them, and not cells


• Parasites: take over cells, require a host cell to exsist



• Gene Expression: making of proteins.

Then we talked about viruses reproduced by the lytic cycle or the lysogenic cycle

The picture on the right is a picture of a lytic cycle. As you can see virus first attaches it to the host (cell). Then releases the virus into the cell and attack the bacteria. Then start to make new tail fiber and then bursts out to spread the virus throught the body.

The Picture on the left is a picture of both lytic cycle and lysogenic cycle

The picture here shows us that the virus in the lysogentic cycle is attaching itself to the host's DNA. Then the cell replicates with the viral DNA. Lastly, the DNA exits host and make new viruses.

The homework was to read 20.2 and do correll notes on the chapter.

MY MUDDIEST POINT!

My muddiest point is probably the food wed. One is that I don't really get how the energy gets lost by going up and I didnt get the question # 15 on the Ecology quiz: In the food web, the majority of the energy which entered the ecosystem did not make it to the shark. What happened to that engergy? I got confused by the question. Can anyone help me?

Unit 1 reflection!

The unit was a great way to start off and freshen up our brains from our summer. The unit Nature of Science talked/ showed me about what science is and other important facts. The unit was sort of a review for me because in middle school I did do the controll variable, and variables for lab. Also we did hypothesis format IF....THEN....BECAUSE (but this year the because really doesnt matter). I loved theTetrahymena lab because I learned something new the first week and I got to do an experiment. The microscopes were sort of hard to figure out beacuse at my middle school we used the camera microscope not the original kind that Mrs. Stein has. I look forward to the next units and challenges I get to meet and learn from. :)