Recombinant DNA technologies are methods used to do which of the following?
A) induce homologous recombination inside a cell
B) manipulate DNA for the study of specific sequences
C) integrate DNA in computers to make them faster
D) join together DNA molecules from the same source
E) combine chromosomes to make them easier to study
Answer: B
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Crossing over
a. generally results in binary fission. b. involves nucleoli. c. involves breakages and exchanges being made between sister chromatids. d. alters the composition of chromosomes and results in new combinations of alleles being channeled into the daughter cells. e. is the same as disjunction.
The chromosome theory of inheritance, developed by Sutton and Boveri, provided an explanation for Mendel’s
principle of segregation by proposing that:a. sister chromatids separate during mitosis. b. all genes are linked on a single chromosome. c. linked genes are inherited together. d. homologous chromosomes segregate during meiosis. e. homologous chromosomes segregate during mitosis
During the bacterial cell division, the single cells is separated into two cells by
a. centrosomes. b. spindle fibers. c. nucleosomes. d. pinching of the plasma membrane. e. aneuploidy.
The more frequently an action potential is triggered by a stimulus, the greater the intensity of the sensation
Indicate whether the statement is true or false