In what situation can a harmful deletion in a chromosome persist in a population? if it is homozygous if a transposon replaces the deleted region if the homologous chromosome lacks the deletion if the deletion is not in the centromere, so it is not fatal.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.