The diagram shows the results of meiosis. The parent cell has one pair of chromosomes. The locations of three genes are shown
on each chromosome.
Parent Cell
Sex Cells
(
Why are the chromosomes in two of the sex cells different from the chromosomes in the parent cell?
some of the genes were damaged during replication
an insertion mutation occurred during replication
crossing over occurred in the chromosome
the chromosomes from another parent cell were introduced

parasites can detrimentally affect their host, but also must not allow their host to die before they can complete their life cycle. some parasites have complex life cycles with many different hosts, and have had to find ways of persisting in many different environments during the change from one host to another. ectoparasites live outside the body of the host, and can more easily  disperse, but are  more exposed to predators, parasites, parasitoids. endoparasites live inside the body of the host, and are therefore protected from the outside environment. but they can be  attacked by the host's immune system. they have therefore developed  mechanisms for dispersal such as  complex life cycles.

i believe the answer is a or 1