Problem:

Question 1: Assume you are a pediatrician. During a physical examination of one of your patients, determine that she has leukemia. Which of the following choces could be more associated with your diagnosis?

1. Erythrocytic cells
2. Lymphoid progenitor cell
3. Myeloid progenitor cell
4. Natural killer cell
5. A, B and C are correct

Question 2: In Drosophila, positional information for the development of the anterior, posterior sections of the fly is provided by the ratio of the concentration gradients of two collectively known as :

1. Progenitor cells
2. Morphogens
3. cAMP
4. cadherins

Question 3: Mammalian cells capable of forming al the cells of the embryo in addition to the trophoblastic cells of the placenta are known as:

1. Progenitor cells
2. Totipotent stem cells
3. Myeloid stem cells
4. Unipotent stem cells
5. Multipotent stem cells

Question 4: Assume that you are interested in studying cell fate. You colleague gives you a potent drug that she has previously used to induce development of brain from undifferentiated cells. You treat a group of biastocysts(usually destined to form the heart) with the appropriate concentration of the drug. To your surprise you find that the blastocysts formed the heart despite the treatment with the drug. What could be a reasonable conclusion n regards ot the cell commitment assuming your drug is active and the cells have the potential respond to the treatment?

1. The blastocysts are using labile specification
2. The cell fate of the blastocysts is determined
3. The vlastocysts are not fully committed
4. The blastocysts are not inducible
5. Both A and B are correct

Question 5: Viviparity occurs in which of the following group of organisms?

1. Reptiles
2. Amphibians
3. Birds
4. Shirks
5. Placental mammals

Please suggest correct choise.