Whata are hetrerozygous alleles???? help!!?

Alleles are copies of a gene. Think of peas, for example. The peas can be smooth or wrinkled. One allele codes for smooth peas. Another codes for wrinkled peas. If you have two different alleles (one for smooth, one for wrinkled), they are heterozygous. If they are the same (two smooth or two wrinked), they are called zygous. "Hetero" means different and "" means same in this case.