In humans, the inability to tongue roll is dominant to reces…

In humans, the inability to tongue roll is dominant to recessive tongue-rolling ability.  A tongue-rolling female has a child (Ernie) with a non-tongue rolling male.  The male’s mother is a tongue-roller.  What of the following is NOT a possible genotype of Ernie?

Numerical answer.  A pure-breeding tall pea plant is crossed…

Numerical answer.  A pure-breeding tall pea plant is crossed with a pure-breeding short pea plant.  An F1 generation is produced that is all tall plants.  The individuals in the F1 generation are crossed with each other (or self-fertilized).  What percentage of the F2 offspring will be tall?  Enter as a whole number.