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>
No, it is not precise. The law of energy conservation states that it is impossible to produce or destroy energy. Plants convert light energy from the Sun via the photosynthesis process into chemical energy.
