Homology

They contain versions of the same genes or alleles in the same spot for any given trait.

Since they're so similar, we call the pairs homologous chromosome pairs.

Homologous is a word that comes up a lot in genetics.

It just means that two things have the same homo relation logos, even if they are a little bit different.

However, there are some very special cells that you have that have only one half of that amount, 23 chromosomes.