Genetis Case Study

Genetics case study

1. A. 50%. Alice has 2 X chromosomes. One that carries the gene for hemophilia and one that doesn’t. Therefore, her children each have a 50% chance of being a hemophiliac.

B. 50% chance that her daughter was a carrier for the same reason. 0% chance that she was hemophiliac. Her father would have had to been hemophiliac.

C. 25%

2. A. Eugenie, Leopold, and Maurice all carry the gene for hemophilia. This conclusion can be made based on the key to the family tree. Those with half or whole shaded areas are carriers or have hemophilia.

B. Normal because neither his mother nor father carry the gene.

3. A. 1/16

B. 0% chance if the mother was normal.

C. He would pass the gene to all his daughters so they all would be carriers.

D. If tier mother was normal they would not be hemophiliacs.

4. A. Both his mother and grandmother would have to be carriers. There is not enough information about his father and grandfather. It is plausible.

B. It is not very plausible because Nikolas II did not have hemophilia. It entered the family bloodline through his wife Alix. http://www.hog.org/handbook/article/1/3/the-history-of-hemophilia.

5. If one of the sons was hemophiliac we can assume that their mother was a carrier.

Based on what little I have read over the years about the Czar of Russia and his reign I believe the revolution would have happened whether there was hemophilia in the family or not. The Russian people were unhappy and were ready for a revolt.