I think the answer is C but i am sorry if i am wrong i took this test but i am pretty sure it is C have a good day and good luck on the test
When atoms in a covalent bond share electrons unequally (one atoms pulls more than the other), the bond is said to be a polar bond is formed when electrons are unequally shared between two atoms. Polar covalent bonding occurs because one atom has a stronger affinity for electrons than the other (yet not enough to pull the electrons away completely and form an ion).
The structure of the nucleus is that it has the protons (+) and the neutrons (0).
if we cross XNXN(normal, non-carrier female) with XnY(color-blind male)
we get XNXn XNY XNXn and XNY
genotype ratio: XNXn:2 XNY:2
phenotype ratio:2 carrier females and 2 healthy males
