The first one ..... <span>0 BB: 2 Bb: 2 bb use punnett squares it helps, just search how to use them.</span>
In recent molecular genetic studies, genes associated with the neurotransmitter Dopamine have been linked to ADHD.
ADHD stands for Attention Deficit Hyperactivity Disorder. People with ADHD have a hard time focusing on tasks. Scientists have found that the low levels of dopamine in the brain are associated with the symptoms of ADHD. It is because the neurons in the brain have a high amount of protein called the dopamine transporters. These proteins block the dopamine from passing between the neurons. This decreases the effect of dopamine.
The genotype for a homozygous pea plant is RR and rr and a Heterozygous pea plant is Rr
