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

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.