_____ is a hormone that triggers the gonads to release sex hormones
a. Estrogen
b. Testosterone
c. Progesterone
d. Gonadotropin-releasing hormone
e. Luteinizing hormone
ANSWER: d
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Which of the following inheritance patterns is matched with an inaccurate molecular basis?
A. Incomplete dominance: The protein produced by a wild-type allele affects the phenotype in a concentration-dependent manner. B. Codominance: Two proteins are produced in heterozygotes. C. Sex-influenced: Hormones alter the expression of proteins encoded by dominant and recessive alleles. D. X-linked: Hemizygotes with the recessive allele do not make a functional protein, but heterozygotes do. E. Simple Mendelian inheritance: The protein produced by a single allele cannot produce the dominant phenotype.
Communication and integration of responses between simultaneously occurring cell signaling pathways is called
____.
a. mutualistic responding b. effector coordination c. cross-talk d. amplification e. signal transduction
Based on the fossil record, which of the following groups evolved about 1.8 million years ago and
made fairly sophisticated tools, including the hand axe?
a. Homo habilis b. Homo erectus c. Australopithecus africanus d. Australopithecus afarensis e. Homo neanderthalensis
Which of the following are true?
i. Genetic drift occurs by chance and Natural selection is dependent on the trait possessed. ii. Genetic drift is dependent on the trait possessed and natural selection occurs by chance. iii. Genetic drift has a correlation with the population size. iv. Natural selection has a correlation with the population size. A. i and iv B. ii and iv C. ii and iii D. i and iii