A duplicated chromosome has _____ chromatid(s)
a. one
b. two
c. three
d. four
B
You might also like to view...
Consider the phylogenetic tree shown above. Geographic labels indicate the origin of humans sampled for mtDNA sequence analysis. Chimp is the outgroup. Which of the following statements is correct?
A. The tree supports the "out of Africa hypothesis" for the origin humans because it implies that the common ancestor of all the humans is of African origin. B. The tree does not reveal anything about the geographic original of humans. C. The tree supports the multi-regional hypothesis because there are four independent populations. D. The closest relative to the Kenyans are the English. E. The Chinese share a more recent common ancestor with the Ethiopians than the Kenyans.
Briefly describe the relationship between DNA methylation, small RNAs (also known as RNA interference), and mobile genetic elements
What will be an ideal response?
The Ames test is used to identify potential carcinogens on the basis of their ability to
A) relocate genes from one section of the genome to another. B) cause back-mutations in bacteria. C) cause replication. D) induce excision repairs
During the initiation of nitrogen-fixation nodules, how do the Rhizobium bacteria enter into the cortex of the root?
A. through the plasmadesmata of the root hairs B. using proton pumps C. by repeated cell divisions D. via the apoplastic pathway E. through a membrane tube called an infection thread