Jolie has sickle-cell trait, a temporary, relatively mild form of sickle-cell anemia, but does not have full-blown sickle-cell anemia. Her condition is most likely the result of
a. incomplete dominance between one allele for normal blood cells and one for sickle-shaped cells.
b. two recessive alleles for sickle-shaped cells.
c. a dominant sickle-shaped cell allele and a recessive normal blood cell allele.
d. two dominant alleles for normal blood cells.
a
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The principle that the just noticeable difference of any given sense is a constant fraction or proportion of the stimulus being judged is called __________
a) the opponent-process principle. b) the doctrine of specific nerve energies. c) the phi phenomenon. d) Weber's law.
In brief, heterogamy is the way to describe partners who are
a. in plural committed relationships. b. both monogamous and heterosexual. c. both unfaithful and heterosexual. d. dissimilar in some way, such as race, age, or religions.