Indicate the nature of the trait and type of inheritance involved in each of the following situations. (a) Children who exhibit this trait have at least one parent who exhibits the same trait.  (b)...

Indicate the nature of the trait and type of inheritance involved in each of the following situations.

(a) Children who exhibit this trait have at least one parent who exhibits the same trait.

 (b) Children exhibit this trait even though neither parent does.

(c) The trait is expressed more commonly in sons than in daughters.

 (d) Tongue-rolling is expressed equally in both daughters and sons.