The right pulmonary veins carry blood to the the right pulmonary veins carry blood to the oxygenated; left atrium oxygenated; right lung deoxygenated; left atrium deoxygenated; right atrium deoxygenated; superior vena cava

Oxygenated; left atrium

Explanation:

The pulmonary vein is the only vein that carries oxygenated blood. This is because it carries blood from the lungs to the heart, after oxygenation and de-carbonation, while other vein carries deoxygenated blood from tissues to the heart via the venacava vein.

After the left atrium receives the oxygenated blood, it channels it to the left ventricle that pumps the blood to the tissues via the aorta artery.  

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

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