you would be playing against the odds if you dont... genes like autosomal recessive cream and sexlinked barring are not complex genes at all, so determining the outcome of such cross is not difficult at all, now when talking about autosomal red(polygenic trait) all bets are off, these trait is not as easy to deal with,Do I think that the words of anyone who claims to be a genetics guru on the internet are something I adhere to like gospel - no.