It is an example of Natural Selection, Modern Theories of Evolution.
Natural selection
Genetic drift
Genetic drift
No you do not have to be a certain age, although you are more likely to get it when you are vulnerable for example, a pregnant woman. (i think)
mosquitos carry infected blood from those with malaria and when they bite another person the pathogen is passed onto them and they are likely to get malaria :)
Dominant allele because its more likely to be received by the next generation.
Malaria was most likely spread through the bite of a female mosquito.
in parasite
A dominant allele is an allele that can take over a recessive allele, so if you have a dominant allele and a recessive allele, then the offspring will most likely have a dominant allele over a recessive allele. The dominant allele is expressed over the recessive allele.
A lethal allele is maintained in population for example when you use bug spray on cockroaches there will be at least one cockroach with an allele that protects it from the bug spray, it then breeds and the allele Is passed to it's offspring and they will also be immune to the pesticide. Those babies will most likely breed with each other when they are mature passing on the allele from both of the parents making the offspring 100% immune. It's the same concept for lethal alleles.
doctors or nurses more likely to be a nurse
If an allele is masked, it is most likely recessive, but not necessarily. This is due to epistasis, the interaction between two or more genes to control a single phenotype. For example, "K" codes for more keratin pigment in the skin, but "k" does not. One can still be albino, however, for if they get the dominant "A" allele, this allelle will override and mask the dominant "K" pigment in the skin, making the person albino.
deserts