Are there only 2
- are there only 2 alleles for each gene
- are there only 2 types of cells
- are there only 2 teams in the pac 12
- are there only 2 types of diabetes
- are there only 2 sith at a time
- are there only 2 white rhinos left
- are there only 2 rhinos left
- are there only 2 sexes
- are there only 2 genders biologically
- are there only 2 genders
