Help! two quick questions! Because every normal body cell contains homologous pairs
of chromosomes, it holds 2 alleles of each gene.

1. What are alleles?

2. Where do these 2 different alleles come from?

1.Alleles are a pair of genes that occupy a specific location on a particular chromosome and control the same trait.2.An allele is one of two or more versions of a gene. An individual inherits two alleles for each gene, one from each parent.

Synapse nervous system they process and transmit signals. in a neuron