#Question id: 3359
#Unit 11. Evolution and Behavior
Amount of p allele is 100, amount of q allele is 50 at locus in population at time, after forward mutation their amount will change as following, p become 70 and q become 80. What is amount of change in frequency of q allele?
#Question id: 31057
#Unit 4. Cell Communication and Cell Signaling
#Question id: 13143
#Unit 10. Ecological Principles
The Norway rat (Rattus Norvegicus), a widespread pest, was controlled for about a decade by the anticoagulant warfarin. This chemical substance, placed in food pellets, is absorbed by the intestinal tract and inhibits the clotting of blood. After a population decline for about 10 years, rat populations increased and stabilized. In one European population, as illustrated in the graph below, the percentage of rats resistant to warfarin has remained fairly stable over a number of years.
Resistance to warfarin is governed by a dominant autosomal gene, R. More than 15 percent of the resistant animals are heterozygous at this locus (Rr). The table below indicates the response to warfarin and relative reproductive fitness of individuals that are homozygous or heterozygous for the dominant gene (R). The RR individuals have a 20-fold increase in vitamin K requirement over individuals.
#Question id: 11055
#Unit 10. Ecological Principles
Poison arrow frogs have brightly coloured skin patterns of blue, orange, yellow and red. This skin adornment is an example of what kind of defense against predation?
#Question id: 10880
#Unit 10. Ecological Principles
Which marine zone would have the lowest rates of primary productivity (photosynthesis)?
