Which of the following is a unique feature of viruses that separates them from bacteria?
A. They lack proteins.
B. They are generally smaller.
C. They have different nucleotides in their hereditary material.
D. They cannot exist outside of a host cell.
E. They are often highly toxic.
Answer: B
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Prader-Willi syndrome and Angelman syndrome are both caused by the same genetic deletion on
human chromosome 15, but they have very different phenotypes. Which disorder occurs depends upon which parent provided the chromosome with the deletion. This is an example of
a. sex-linked inheritance. b. uniparental inheritance. c. cytoplasmic inheritance. d. genomic imprinting. e. maternal inheritance.
Polyploid individuals that arise from chromosome duplications within a single species are called
a. allopolyploids. b. tetraploids. c. triploids. d. autopolyploids. e. sympatric polyploids.
A type III survivorship curve is characteristic
of
a. dogs. b. goats. c. hawks. d. clams. e. horses
Which method is used to prevent hemolytic newborn disease?
a. EPO injections b. Rh transfusions c. Rh antibody injections d. cross-matching e. RhoGam injections