Answer the following question given this paragraph: 

When gametes unite during fertilization, the resulting zygote inherits two alleles for each gene. One allele comes from each parent. The alleles an individual inherits make up the individual’s genotype . The two alleles may be the same or different. As shown in Table below , an organism with two alleles of the same type ( BB or bb ) is called a homozygote . An organism with two different alleles ( Bb ) is called a heterozygote . This results in three possible genotypes.


Q: When gametes unite during fertilization, the resulting zygote inherits two of what for each gene, one from each parent?

 Choices:

- chromosomes

- genomes

- molecules

- alleles

A:
alleles
