They are soluble. Often, they are of an appropriate polarity and size as well.
In water molecule the electrons between the oxygen and the hydrogen are shared, but the sharing is not equal. Oxygen pulls electrons slightly towards itself. Therefore, the electrons are more near the oxygen, making that part of molecule(oxygen part) slightly negative. Since the electrons are not near the hydrogen so, that part of the molecule is slightly positive.
Answer:
1. 25% if it also includes the other parent's unknown alleles and 50% if it does not take into account the other parent.
2. The law of independent assortment states that organisms inherit each allele from their parents separately.
3. The type of dominance is incomplete dominance.
pretty sure it is an ultrasound