In humans, the ability to roll your tongue is dominant while not being able to roll your tongue is recessive. The gene for tongue rolling ability is represented by the letter R. Johnny can roll his tongue.

What are Johnny's possible genotypes?

Rr Rr . becaUse of science you so dunb arshole

come on how u  not know this

answer: at room temperature (roughly 20 degrees c), you can dissolve 203.9 grams (or 200 grams) of sugar in 100 ml of water. as water temperature increases, the amount of sugar that will dissolve increases, up to about 500 grams of sugar in 100 ml water at 100 degrees c.

explanation:

catya that's not even a b or c