Quantitative inheritance involves the interaction of a number of gene loci. The pattern of genetic transmission typical of quantitative inheritance is ________
A) discontinuous distributions such as 3:1
B) a 9:3:3:1 ratio
C) usually a pattern that clearly reflects dominance and recessiveness
D) continuous variation of phenotypic expression
E) typical of Mendelian inheritance
Answer: D
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It takes very few molecules of a hormone to cause changes in a target cell. This may be explained by the fact that: (Select all correct answer options.)
A. transcriptional activation produces many copies of mRNA, each of which is translated many times. B. the mechanism of hormonal action involves the replication of the hormone within the target cell to quickly magnify the hormone's effect. C. hormones are large molecules that persist for years and can repeatedly stimulate the same cell. D. the mechanism of hormonal action may involve an enzyme cascade that amplifies the response to a hormone. E. the mechanism of hormonal action involves memory cells that have had prior contact with the hormone and immediately respond to its presence.
What is the study of the effects of climate on the cyclical life events of organisms?
a. phonology b. phrenology c. phenology d. phenomenology
The pulmonary veins deliver blood to the ____
a. right atrium b. right ventricle c. left atrium d. left ventricle e. lungs
The brief length of time when mammals and birds learn the appearance of a parent is called:a
imprinting. b. habituation. c. classical conditioning. d. operant conditioning. e. insight learning.