To avoid the funneling effect, it would take multiple humans or whatever within a species to gain all that is needed in the first place to reproduce without serious problems. In fact, I think I once heard the same objection raised for Noah's Ark. That being the limit of people on the Ark would cause a funneling effect of DNA. I do not remember the technical term.
The technical term is often illustrated by a bottleneck of too many people trying to go through the same line or door at the same time at a store.
So, how did the limited number of people on Noah's Ark create enough variation to account for the many variations in the human race scientifically speaking?
This question is assuming evolution is true, and that there was not a special creation which would have all the genes or DNA necessary to produce all the types of dogs that exists today.
Young Earth Creationists would often answer this question by claiming that one pair of dogs on the Ark had all the kinds or types of dogs in their DNA or genes.
Personally, I simply admit that I do not have an answer. And, this is one of the many questions, I have put on the back burner to ask God about when I get to heaven. Since, my mere 170 IQ is no where near that of God, I have no problem waiting for him to answer when I get there.
Note: A local flood position would not have this problem since other humans and animals could survive where there was not a local flood.
