The relatively high percentage of individuals in West Africa who are heterozygous for the sickle cell trait is an example of _____
a. natural selection
b. genetic drift
c. spontaneous mutational spread
d. heterozygote disadvantage
e. the founder effect
a
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Endotoxins must be eliminated from biomanufactured products because they ________
A) render the product inactive B) interfere with the product's absorption C) cause pain, fever, and more severe symptoms in humans D) are from unknown origin E) cause problems for the cell line used to produce the product
If two species have incompatible mating structures, then which reproductive isolation mechanism prevents them from
mating? a. sexual isolation b. gametic isolation c. temporal isolation d. behavioral isolation e. mechanical isolation
If the allele for inflated pea pods (I) is dominant to the allele for constricted pods (i), then the cross Ii xii is expected to produce
A) 3/4 with constricted and 1/4 with inflated pods. B) all peas with inflated pods. C) 3/4 with inflated and 1/4 with constricted pods. D) half with inflated and half with constricted pods. E) all peas with constricted pods.
While both parsimony methods and distance methods can be quite effective in inferring evolutionary history, both use tricks of sorts. Compare the assumptions, shortcomings, and methods of each
What will be an ideal response?