This region exhibits 90% interference. How many double crossovers would be recovered in a three-point cross involving b, c, and sp out of 1000 progeny?
In Drosophila, the genes b, c, and sp are linked and arranged as shown below:
b——30 m.u.——c——20 m.u.——sp
A) 3
B) 6
C) 54
D) 60
E) 600
B) 6
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Which of the following is true regarding transformed cells that are plated on growth media containing ampicillin?
A. Each colony began with one antibiotic resistant cell. B. All cells in a single colony are resistant to the antibiotic ampicillin. C. Only the founder cell of a single colony is resistant to the antibiotic ampicillin. D. Cells that did not take up the plasmid will survive on the medium. E. Each colony began with one antibiotic resistant cell and all cells in the colony are resistant to the antibiotic ampicillin.
Which of the following do not get infected by viruses?
A. Plants B. Animals C. Bacteria D. Animals, plants and bacteria can all be infected by viruses.
Different courtship displays among closely related bird species are an example of:
1.Temporal Isolation 2.Mechanical Isolation 3.Ecological Isolation 4.Behavioral Isolation
What two key adaptations in plants were necessary for insect pollination to be successful?
What will be an ideal response?