Why do these inbred dogs look like mutts?

this girl I know had an 'oops' litter.. her male busted out of his crate and mated with his mom. Both are purebred Siberian huskies. But their puppies look like mutts. They are now close to a year old and they just don't look like huskies. Some of them have floppy ears, they all have extra fur around their necks and heads making them look like lions, and a few of them don't even have the body shape of a husky. Is this all because they're inbred? Both of the parents were purebred so why did the puppies come out looking like mutts?