In humans, being a tongue roller (R) is dominant over non-roller (r). If both parents are heterozygous for tongue rolling. What is the probability of producing a heterozygous tongue roller child?

50%

Explanation:

This is because the Father will have Rr and the mother RR that being said if you do a chart you will find out it is 50%

R   RR   RR

r    Rr    Rr

While the heads of the phospholipid structure attract water, the tails are hydrophobic. The model shows how the hydrophilic section folds around the fluid molecules to bring them into the cell so they don’t need to pass through the hydrophobic tails.