A recessive gene allele
a. can only be expressed when paired with a matching allele
b. can influence a genotype, but not a phenotype.
c. can influence the phenotype of female children, but not male children.
d. can influence a phenotype when it occurs in pairs or on the X chromosome.
d
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To reduce the risk of SIDS, experts recommend __________.
A. not exposing babies to environmental factors that impact breathing, such as excess heat or secondhand smoke B. a soft sleeping surface C. putting infants to sleep on their stomachs D. keeping infants extremely warm during the night, so they will not catch a cold
Jimmy is only three days old, but he is making a high-pitched cry, is moving his arms and legs back and forth, and has an elevated heart rate. It is likely that Jimmy is currently
a. needing a diaper change b. hungry c. in pain. d. experiencing REM sleep.
Ethical standards permit deception in research studies if __________
A) the participants are young enough that they would not understand the deception B) investigators satisfy institutional review boards that such practices are necessary C) researchers can observe participants from behind one-way mirrors D) the participants give informed consent and the researchers never reveal the real purpose of the study
If a genetic disease is sex linked, it is likely that females will ________ and males will ________
a. be carriers of the disease; be carriers of the disease. b. be carriers of the disease; have the disease. c. have the disease; be carriers of the disease. d. have the disease; have the disease.