Free earlobes are dominant to attached ear lobes and brown eyes are dominant to blue eyes. Ricardo
has brown eyes and attached ear lobes. Ricardo’s mother has blue eyes and free ear lobes. Ricardo’s
partner, Shanteel, has blue eyes and free ear lobes. Shanteel’s mother has brown eyes and attached ear
lobes. What is the probability that Ricardo and Shanteel will have a child who has blue eyes and
attached ear lobes?
A. 100 percent
B. 75 percent
C. 50 percent
D. 25 percent
E. 0 percent
D
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Muscles that act as opposing pairs are____
a. flexors b. agonists
c. depressors d. antagonists e. extensors
In sexually reproducing organisms, cells entering mitosis have the same amount of DNA as cells entering meiosis.
a. true b. false
If two species have incompatible mating structures, then which reproductive isolation mechanism prevents them from
mating? a. sexual isolation b. gametic isolation c. temporal isolation d. behavioral isolation e. mechanical isolation
Which of the following statements best explains why people with Hodgkin's disease often show signs of immunodeficiency?
A) The Hodgkin's disease virus infects and destroys B cells. B) Hodgkin's disease involves the deposition of immune complexes in the kidneys. C) Hodgkin's disease is a type of cancer that affects lymphocytes. D) Hodgkin's disease occurs when an immune response elicited by streptococcal bacteria kills normal heart cells as well.