The alternative forms of that are present for a given gene are known as alleles.
Two types of alleles exist for any given gene - these are dominant allele and recessive allele.
A dominant allele is the one which always expresses itself in the presence of another allele, that is it can express itself in both heterozygous and homozygous situation.
A recessive allele is only able to express itself in a homozygous condition.
<em>Since the blond hair is not expressing itself in either the mother or father but only in the daughter, it must be a recessive allele.</em>
Adenosine triphosphate (ATP) is a chemical compound cells use to store and release energy. An ATP molecule consists of adenine, the sugar ribose, and three phosphate groups.
This process is called osmosis whereby water exits the cell through its selectively permeable membrane and into the salt solution to dilute and balance the pressure caused by the concentrated salt solution.
