Tails that have equally sized upper and lower lobes are called:
a. heterocercal.
b. ganoid.
c. cycloid.
d. homocercal.
e. ctenoid.
D
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Which of the following is true of incomplete penetrance?
A. Environmental factors do not influence penetrance. B. Incomplete penetrance implies that some individuals will experience less severe forms of disease such as cancer or Alzheimer's. C. Gene interactions have been shown to result in incomplete penetrance in some cases. D. Incomplete penetrance refers to cases in which individuals developing a particular disease (e.g., cancer or Alzheimer's) lack the typical genotype for this disease.
The number of copies of our genome in most of our cells is ________.
A) 1 B) 2 C) 3 D) 4
The ABO blood groups in humans are determined by a multiple-allele system in which IA and IB are codominant and are both dominant to IO. A newborn infant is type A. The mother is type O. Possible phenotypes of the father are
a. A, B, or AB. b. A, B, or O. c. O only. d. A or AB. e. A or O.
During respiration, what is the additional amount of air that can be exhaled from the lungs during an extra-deep exhalation called? This volume is usually around 1,400 ml.
A. inspiratory reserve volume B. residual volume C. tidal volume D. vital capacity E. expiratory reserve volume