What is the most widely accepted biological definition for a species?
a group of closely related organisms with the capacity to interbreed and produce fertile offspring
a group of organisms that cannot interbreed or produce fertile offspring
a group of related organisms that can interbreed
a group of unrelated organisms that can interbreed

The alleles are separated during gamete formation.Remember that during meiosis (gamete formation), homologous chromosomes are separated and end up in different gametes. Alleles for a gene pair are found on these homologous chromosomes (one allele per chromosome) so they are also separated. We represent this using a Punnett square because each allele goes in its own section on the outside of the square.