Applications of CRISPER-Cas in biotechnology include all of the following EXCEPT ________
A) creating bioreactors to manufacture human proteins
B) modulating epigenetic regulation
C) engineering pigs that are resistance to PRRS
D) increasing drought resistance of crops
Answer: B
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In order for the scientists to artificially select Drosophila for their number of bristles,
In the laboratory, fruit flies (Drosophila) were artificially selected for the number of bristles on their bodies. One population (R) was selected for low numbers of bristles, a second population (S) for high numbers of bristles.
A. no change was seen; it's much too soon.
B. some slight increase of bristle numbers was already evident.
C. a vast, overlapping range of bristle numbers was seen.
D. a slight increase in bristles in S, a slight decrease in R, with a little overlap in the middle ranges.
E. a huge increase in S, a huge decrease in R, with no overlap whatsoever.
Paired homologous chromosomes are found at the center of the cell during _____ of meiosis
a. metaphase I b. telophase I c. prophase II d. metaphase II
e. anaphase IIA human diploid cell has ____
a. 23 chromosomes b. n sets of chromosomes c. only the X or Y chromosome d. 23 pairs of homologous chromosomes e. 46 different chromosomes
A bacterial pathogen has just entered the body of a person. Describe the sequence of events that lead to
the production of enzymes that will hydrolytically destroy the bacterial cell, beginning with events in the nucleus and ending with destruction of the pathogen.What will be an ideal response?