The neurotransmitter is Dopamine.
The following combinations of neurotransmitters seem to be at play in
those who suffer from ADHD is Serotonin, dopamine, and norepinephrine. Neurotransmitters,
also known as chemical messengers, are endogenous chemicals that enable
neurotransmission. They transmit signals across a chemical synapse, such as a
neuromuscular junction.
There’s a 0.5 chance of getting a y allele from parent 1, 0.5 chance of getting an r allele from parent 1, 0.5 chance of getting a y allele from parent 2, and 0.5 chance of getting an r allele from parent 2.