<P> May be Mendelian but there is conflicting evidence: </P> <Ul> <Li> Ability to smell (bitter almond - like) hydrogen cyanide (recessive) </Li> </Ul> <Li> Ability to smell (bitter almond - like) hydrogen cyanide (recessive) </Li> <P> Some traits were previously believed to be Mendelian, but their inheritance is likely based on more complex genetic models, possibly involving more than one gene . These include: </P>

How many alleles are there for a mendelian trait