Gametes produced by an organism contain a combination of genes from that organism. In every gamete this combination is - A. The same because it is created from the same DNA
B. The same because chromosomes are copied prior to meiosis
C. different due to DNA replication prior to mitosis
D. different due to independent assortment during melosis

D. different due to independent assortment during meiosis

Explanation:

Have you looked at how siblings (except twins) are not exactly identical?  Also, Mendel's Law of Independent Assortment.

It is not A because of independent assortment.

It not B because the chromosomes get assorted

It is not C because gametes are formed in meosis not mitosis

The best answer is D

i believe the correct answer from the choices listed above is the first option. the scientists need to look at the   validity of data, claims, hypotheses, and observations before  developing an argument. they base their arguments on facts that are present and they make sure they have proofs. 

explanation:

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.