Question

for a diploid organism ( sexual reproduction), a gene must be located at _______
and count at least with __________

1 locus - 1 allele
1 locus - 2 alleles
2 loci - 1 allele
2 loci - 2 alleles

Answer 1

i would say b, but someone can explain why

Answer 2

It is not a good question. All genes are, by definition, at a locus and are an allele. For sexual reproduction (genetic recombination) of a diploid there must be at least two alleles. One allele per chromosome copy, though the alleles do not need to be different—like how there can be a gene with two dominant copies.