Warm Up 11 is due Wednesday April 7, 2004, at 9:30 am
Remember...look at the lecture notes and do the readings before (or while) doing the Warm Up. You may need to look terms up in the book's glossary or on the CD (or on google!).

First name :

Last name :

Class Section (1, 2 or 3):
(See Oncourse to determine whether you are in 1= A410, 2 = A411, or 3 = A413)

Please enter a nickname (in case your answer is used in class!)

The following three questions refer to material you were to read in preparation for class. These questions require you to write a three or four sentence response. It is OK to answer 'I don't know' - but STATE WHY you are confused! (Don't just say 'I don't know' - you probably DO!) Each WarmUp worth 3 points if answered on time and must be submitted via the web. See notes page for prior Warm Ups and student responses.

QUESTION 1: Achondroplasia is a dominant genetic disorder and causes severe changes in skeletal and bone growth and development, resulting in a dwarf phenotype. People who are not dwarfs - this includes most or all N100 students - are homozygous recessive for this gene (aa). People with achondroplasia (dwarfism) are all heterozygous (Aa). However, no people with dwarfism are homozygous dominant for this trait (There are no people who have the genotype AA). Why do you think the genotype AA is not found is people with dwarfism?

QUESTION 2: Allison is driving with her parents, Kate and Bob, when they get in a serious car accident. At the emergency room, her doctor (you) tells Allison that her mother is fine, but her father has lost a lot of blood and will need a blood transfusion. Allison volunteers to donate blood, and you tell her that her blood type is AB. Bob is type O. (1) Can Allison donate blood to Bob? Why or why not? (2) Allison, who is a biology student, begins to wonder if she is adopted. What would you tell her and why?

QUESTION 3: Sex linked disorders (carried on the X chromosome) like color blindness, hemophilia, and muscular dystrophy, are frequently passed from carrier mothers to sons, who are affected with the disorder because they have only one X chromosome. However, sometimes females are born with color blindness, hemophilia, or muscular dystrophy. How can this happen?

QUESTION 4: Optional: questions or comments about genetics - genes - human genetic conditions?

You can change your mind as many times as you like before hitting Submit. Print this page before submitting if you want to keep a record of your answers. You will get a confirmation box to let you know that your answers were submitted, and will return to the N100 main page after submitting.