Why is the principle of segregation important?

Question

So far, I have figured that it basically allows us to understand HOW inheritance happens. I mean, back in the day people didn't even know that alleles existed, they only knew some kind of blend occured but they didn't know exactly how. Now, we do and this is one importance. How else is the law important?

As a refresher, the principle of segregation basically states that when gmetes are being formed, there are two alleles that separate in equal proportions and go into each gamete.

That's as simple as I can think of it but if you'd like to help me amplify it go right on.

Thanks all.

Answer 1

Segregation involves random mitotic crossing over which results in enhanced genetic variation (it's the reason all of us look different from each other).  This variation is in turn a driving force for evolution.