R= no red hair
r= red hair
if the child has red hair, both of the parents would have to have hetrozygous alleles. (Rr) And when the child would have had to pick up both of the recessive traits with red hair. (r)
Neurotransmitters is the word you're looking for.
Explanation: Should We Fill The Blanks ? Or What I don't understand this question
Hello!
The correct answer is: C. Malleus, Incus, Stapes.
(It's actually C, my bad).
I hope this helped you! c: