Imagine that we mate two black Labrador dogs with normal vision and find that three of the puppies are like the parents, but one puppy is chocolate with normal vision and another is black with PRA (progressive retinal atrophy, a serious disease of
vision). We can conclude that
A) both of the parents are homozygous for both traits.
B) the same alleles that control coat color can also cause PRA.
C) the alleles for color and vision segregate independently during gamete formation.
D) the alleles for color and vision segregate dependently during gamete formation.
Answer: C
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Did Darwin develop his theory of evolution through experimentation or observation or other methods?
A. Experimentation. B. Observation. C. Both experimentation and observation because he collected samples but also worked experimentally with finches. D. Mathematical analysis of experimental data.
The opening of the larynx is called the
A) Glottis B) Epiglottis C) Vocal cords D) Pharynx
An agricultural worker experiences difficulty breathing which becomes progressively worse. Tests show inflammation and damage of the lung tissue, but IgE antibodies and granulocytes are in the normal ranges. With which disorder of the immune system are
these signs and symptoms consistent? A) allergic reaction B) type III (immune complex-mediated) hypersensitivity C) type IV (delayed) hypersensitivity D) autoimmunity E) acquired immunodeficiency
Chromosomal regions that represent evolutionary vestiges of duplicated copies of genes that have underdone sufficient mutations to render them untranscribable are called ________
A) satellites B) LINEs C) transposons D) alleles E) pseudogenes