The rhesus blood group gene (rhesus positive = R; rhesus negative = r) and a gene that causes a form of anemia called elliptocytosis (E = anemia; e = no anemia) show linkage. In 50 families, one parent is Rh negative with no anemia (r___e r___e) and the other parent is Rh positive with anemia (R___e r___E). Of 50 offspring: 22 are R___e r___e      22 are r­___E r­­­­___e        3 are R___E  r___e     3 are r___e r___e. Based off these 50 families. How many map units apart are the genes?

Questions 47 to 56 relate to material covered in BIO8023 (Modern Microbiology)

Spider goats, who have a gene to produce spider silk instead of milk, are an example of:

Question 2 This is an experimental study.

The lipopolysaccharide (LPS) that is found in the outer membrane of gram-negative bacteria is also know as which of the following?

Answer only ONE essay question. You may select any one question to answer from the list provided in Essay Set 1 (question 59) and Essay Set 2 (question 60). Your response to this one question is worth 5 points so please be thorough. Do not answer more than one question as only your first answer will be graded.

The chemical properties of messengers affect how they are able to communicate with the target cell. Hydrophobic and hydrophilic messengers have many differences in the way they function.  a) What biological process is used by a hydrophobic messenger to exit the signaling cell? b) What biological process is used by a hydrophilic messenger to exit the signaling cell? c) Where are the target cell receptors located for hydrophobic messengers? d) Where are the target cell receptors located for hydrophilic messengers?

a. Identify a member of the nematode group. b. Describe three features true of all nematode groups. These may include features related to symmetry or anatomical features (epidermis, mouth, digestive system, excretory system, reproductive system).

Identify each of the heart chambers depicted with the letters A-H in the diagram below. Arrows indicate the direction of blood flow through the heart.

Name the three germ layers.