Inbred lines of animals, such as laboratory mice, are useful for studying complex traits because:
A. individuals are genetically identical, so
differences in traits must be due to
environmental differences.
B. although individuals differ both genetically
and environmentally, the genetic differences
are known, so differences in traits can be
understood.
C. animals are kept in identical environments,
so any differences in traits are due to
differences in their genes.
D. both genetic and environmental
differences between individuals are known,
making differences in their traits easy to
understand.
E. None of these choices is correct.
A
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Several genes are used in constructing the phylogenetic tree of Eukarya, but the gene(s) encoding for ________ is/are NOT used
A) ATPase B) cytoskeleton tubulins C) RNA polymerase D) tRNAs
If R is dominant to r, the offspring of the cross
of RR with rr will
a. have a unique phenotype. b. have the same phenotype as the RR parents. c. have the same phenotype as the rr parents. d. have the same genotype as the RR parents. e. have the same genotype as the rr parents.
In DNA, the phosphate groups and the sugars are the outside of the double helix
a. true b. false
Which term refers to growth from apical meristems that generally results in an increase in the length of a plant?
a. typical growth b. secondary growth c. primary growth d. longitudinal growth