Human Blood Group Systems Exam 1 Correct

Human somatic cells have _____ pairs of chromosomes? a. 46 b. 23 c. 22 d. 2 - ANSWER Human somatic cells have 46 chromosomes that exist as 23 pairs. One half of each chromosome pair is inherited from each parent. Which of the following have sex-linked recessive inheritance? a. Hemophilia A b. Factor VII Deficiency c .von Willebrand's Disease d. Factor V Deficienc - ANSWER Hemophilia A and Hemophilia B are sex-linked Remember that "sex-linked" means that the gene is carried on either the X or Y chromosome. In the case of Hemophilia A, the gene is carried on the X chromosome. Sex-linked recessive means that you have to inherit TWO copies of the recessive gene for the disease to be fully manifested. A new blood group system is defined in which the two codominant alleles are Q and P. An individual inherits two copies of the Q allele. What phenotype would this individual exhibit? a. Q+P- b. Q-P+ c. Q+P+ d. Q-P- - ANSWER If there are two codominant alleles, then each would be expressed if it were inherited. Since the individual inherited two copies of the Q allele, one copy must have come from the father, and one from the mothe