<span>The brain's pineal gland produces the hormone melatonin, which helps control your sleepiness and wakefulness cycles. Melatonin is a natural hormone in the body which production is </span>stimulated by darkness and decreased by light. This hormone is involved in the <span>internal body clock and regulates diverse body functions.</span>
Answer:
there are many things that are not studied by biologist such as physics, figuring out new elements
Explanation:
biologists are people that study peoples life
Heterozygous
parents have genotype Aa. If we cross two of them then:
<span>Parents:
Aa x Aa</span>
<span>F1
generation: AA Aa Aa aa</span>
<span>This
means that the <span>chances of having a child with the disease
are ¼ (or
25%) and that is the child with genotype aa (homozygous recessive).</span></span>
Idk what this means sorry