Consider the example of sickle-cell anemia and the allele for the sickle-cell trait, and answer the following
t or f: Eventually, natural selection will typically result in the sickle-cell allele being fixed in the
population.
t or f: Selection at this locus is an example of disruptive selection.
t or f: This is an example of stabilizing selection and will decrease the variation at this locus in
the population.
t or f: This is an example of stabilizing selection and will maintain variation at this locus.
t or f: Hypothetically, if homozygous recessives had the highest fitness (i.e. selection was
directional) of the three genotypes discussed in the text, then natural selection would lead to
fixation of the sickle-cell allele.
What will be an ideal response?
t or f: Eventually, natural selection will typically result in the sickle-cell allele being fixed in the
population.
t or f: Selection at this locus is an example of disruptive selection.
t or f: This is an example of stabilizing selection and will decrease the variation at this locus
in the population.
t or f: This is an example of stabilizing selection and will maintain variation at this locus.
t or f: Hypothetically, if homozygous recessives had the highest fitness (i.e. selection was
directional) of the three genotypes discussed in the text, then natural selection would lead to
fixation of the sickle-cell allele.
You might also like to view...
If the bacterial cells were viewed immediately after crystal violet was applied during the Gram stain procedure, gram-positive cells would be purple but gram-negative cells would be colorless.
Answer the following statement true (T) or false (F)
An -OH group is a(n) ____ group.
A. carboxyl B. hydroxyl C. amino D. methyl E. carbonyl
The only molecules that can pass freely through the plasma membrane are ones that
A) are positively charged. B) are small and hydrophobic. C) are ones that are polar. D) are small and polar. E) are small and negatively charged.
In vertebrates, food is moved along the length of the digestive system by __________.
a. peristalsis b. active transport across cell membranes c. diffusion and osmosis d. sequential contraction of bands of skeletal muscles e. sphincter contraction