Population bottlenecks can lead to the fixation or loss of alleles in otherwise large pop-ulations because the bottleneck:
a. selectively eliminates or fixes alleles.
b. reduces the effective population size to close to the size of the bottleneck.
c. allows migrant alleles to overwhelm native alleles.
d. A and B.
e. All of the above.
B
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Duplication of individual chromosomes instead of whole genomes can occur by ________________.
Fill in the blank(s) with the appropriate word(s).
As stem cell research rapidly developed, it became a political and ethical issue. Describe how the ethical and political approach toward stem cell research has changed in the past decade
What will be an ideal response?
The inner mitochondrial membrane contains numerous inward folds called cristae, which greatly increase the surface area of this membrane. Because ATP is produced on the inner mitochondrial membrane, cristae enhance the ability of the mitochondria to generate ATP. What structure can be thought of as similar to these cristae?
A. Cartilage B. Bronchiole C. Finger-like projections of a human's small intestine D. Spiracle
Immunocytochemisty visualizes (i)____________ of interest at a cellular level, whereas in situ hybridization visualizes (ii)________________ of interest in a tissue.
a) (i) protein, (ii) mRNA b) (i) protein, (ii) DNA c) (i) mRNA, (ii) protein d) (i) mRNA, (ii) DNA