These are the possible genotypes RR, Rr, Rr, rr
First 3 carries dominant gene for tongue rolling, so they can do it,
while the 4th genotype rr is homologous for recessive, and he/she can't
perform tongue rolling.
<span>They often use the fossil recordnova net. I hope this helps.</span>
s would be secondary Explanation:
just cause
Answer:
where are the choices????
