help a newbie mixing breeds

[elsy]

I have 6 Hy-line hens, 2 bantams, and 1 Barbrock and a Rhode island red rooster.
I let them out everyday so they are freerange. we feed them, table scraps, laying mash and maize pellets.
if I wanted would the hyline hens and the rhode island rooster make good laying chicks?
and how would I check if the eggs are fertilized

Thanks in advance
Elsy