Thomas suffers from a sex-linked blood-clotting disorder called hemophilia that is transmitted by a recessive gene. Neither his mother nor his father has ever shown symptoms of this disease. What can we conclude about the genetic makeup of John's parents?
A. The father has the faulty gene, while the mother does not.
B. The mother is a carrier for hemophilia, while the father does not have the gene.
C. The mother is homozygous for the faulty gene, while the father is heterozygous.
D. Both the mother and the father have the faulty gene.
Answer: B
You might also like to view...
Amphetamines appear to exert their main effects by altering the release and reuptake of
a. serotonin and acetylcholine. b. dopamine and norepinephrine. c. endorphins. d. GABA.
What is the self?
a. ?a personal database of memories and motivations from our entire life b. ?the patterns of thought, feelings, and actions we perceive in our own minds c. ?the characteristics we retain from our genetic history and share with our family members d. ?the cognitive organization of our brains and the structural layers of our nervous systems
Which is a type of circumstance in which women put themselves at risk for HIV/AIDS infection differently from men?
a. Having unprotected sex with partners whose sexual history is unknown b. Using contaminated needles when injecting illegal drugs c. Turning to prostitution in response to economic deprivation d. Having sex with multiple partners
You have agreed to give a speech before a large crowd. You will most likely experience a better performance if you perceive the speech as a
a. challenge. b. threat. c. primary appraisal. d. secondary appraisal.