Elven genetics

[symestreem]

New hypothetical situation:
Say Elladan or Elrohir stays in Middle-earth (with Elrond) and had a kid (perhaps we could call a young elf 'edhelhon' or 'edhilhon' child or children of elves respectively). Since he did not to Aman, the immortality would still be in question. Would this child then be extended the same choice as its father, or would it simply have to choose whether or not to leave Middle-earth with its father or grandfather?

Along similar lines, if elves and men are the same species, then you could theoretically breed someone with the physical traits of an elf, but mortal, from men.

These half-elven are really confusing. Tolkien seems to have a lot of contradictory information on them. But, the discussion is fun!