The maintenance of genetic variation in sea-squirts (Botryllus scholosseri)has been studied by Richard Grosberg.Interestingly,these sea-squirts have two genetically determined life history forms.In one,called the modules in a colony reproduce once and then die.In the other morph,called colonies reproduce sexually at least three times before they die.

Question

The maintenance of genetic variation in sea-squirts (Botryllus scholosseri)has been studied by Richard Grosberg.Interestingly,these sea-squirts have two genetically determined life history forms.In one,called ________ the modules in a colony reproduce once and then die.In the other morph,called ________ colonies reproduce sexually at least three times before they die.