Read briefly about the process of making a karyotype
1. What does a karyotype analysis involve?
Biologists photograph cells in Mitosis, then cut out the chromosomes from the photograph and group them together in pairs. A picture of chromosomes arranged this way is known as a Karyotype.
2. Do the bands on a chromosome represent a single gene? Why or why not?
No. The colored bands on DNA are the densities of the DNA - in other words, how tightly they are coiled when in the classical X type shape
3. During a karyotype, what is compared in the chromosomes?
Genes are segments of DNA that control specific traits. They are found on different chromosomes depending on the type of trait
Click on patient histories and choose ONE patient (A, B, or C) __a_______ to "Complete the Patient's Karyotype".
1st- place the chromosomes in the karyotype (match them by clicking and dragging)
Then you will be "Interpreting the Karyotype" and answering the questions below:
1. What notation would you use to characterize your patient's karyotype?____autism _______________
2. Describe their karyotype (number of chromosome pairs, any extra ones, etc)
A normal karyotype will show all 23 chromosomes at normal growth, and the end will show an either XY (boy) or XX (girl).
3. What diagnosis would you give your patient? (Hint: scroll down to see the finished karyotype to analyze the abnormality.)
Autism
4. What is their sex? (Hint: Look at Chromosome 23 - is it XX or XY - or something else!)
A boy.
Cladograms
http://www.pbs.org/wgbh/evolution/change/family/
1. What was one of Darwin’s most revolutionary ideas about life on Earth?
2. When did the first simple single celled organism, possibly the ancestor of all living things, appear on Earth?
The first simple celled organism appeared on earth around 3.5 billion years ago.
3. Which two animals do you think are most closely related?
Dolphin Shark Wolf...