If XX chromosome makes a girl and XY chromosome makes a boy hypothetical what would be made if there was a YY

Question: If XX chromosome makes a girl and XY chromosome makes a boy hypothetical what would be made if there was a YY chromosome?
- Keywords:
  boy,
  chromosome,
  gender,
  girl
Asked by 782yttc52 to Anna, Hayley, Iain, Rebecca on 15 Jun 2015. This question was also asked by Tessie.
- anon answered on 15 Jun 2015:
  
  Good question – I’m not an expert on this but I don’t think this would be possible. I don’t think that an organism with a YY chromosome could live and survive, as many essential genes are on the X chromosome.

Question: If XX chromosome makes a girl and XY chromosome makes a boy hypothetical what would be made if there was a YY chromosome?