Mendel's rules do not correctly predict patterns of inheritance for tightly linked genes or the inheritance of alleles that show incomplete dominance. Are his hypotheses incorrect?

His hypothesis are correct in his own frame of reference ...

Explanation:

The hypothesis like in Law of Segregation as well as Law of Independent Assortment are highly reliable with ratios that Mendel has given in their hypothesis. Due to the limits of technology and availability of free knowledge at that time, he could not extend up his study to know about phenomenons of Complete and Incomplete Dominance or Co-Dominance etc. So, his hypothesis are exactly true ...