Blood types (A, B, and O) are controlled by
a. sex-linked genes.
b. linked genes.
c. incompletely dominant genes.
d. multiple alleles.
e. none of these.
Answer: d
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Which one of the following best describes genotype-by-environment interaction?
A. Genetic and environmental factors combine to influence phenotype. B. The genotype of an organism determines how that organism will behave in its environment. C. The environment of an organism determines the genetic make-up of that organism. D. Under certain circumstances, two organisms with identical genotypes have different phenotypes. E. Under certain circumstances, two organisms with identical phenotypes have different genotypes.
The inheritance pattern in which the mother provides gene products to the developing egg cells is called
A. X inactivation. B. extranuclear inheritance. C. genomic imprinting. D. linkage. E. maternal effects.
The chromosome must be ___________ in order to fit into the bacterial cell.
A. supercoiled by topoisomerases B. supercoiled around histone proteins C. organized into loop domains by topiosomerases D. compacted into a nucleosome E. both organized into loop domains and supercoiled by topoisomerases
Sympatric speciation occurs
a. before allopatric speciation. b. together with allopatric speciation. c. after allopatric speciation. d. within the home range. e. outside the home range.