homo-, hom- +
(Greek: same, equal, like, similar, common; one and the same)
This Greek prefix forms many scientific and other terms, often in opposition to hetero-. Don’t confuse this Greek homo- element with the Latin homo- which means “mankind”.
An "allele" is one member of a pair or series of genes that occupy a specific position on a specific chromosome.
Homozygosity has two identical genes at the corresponding loci of homologous chromosomes.