Answer: A
Explanation:
A women has two X chromosomes while men have one X and one Y chromosomes.
<span>A.) vascular ....,,,,</span>
There are three antigens in the ABO blood group system, A, B and H. The ABO gene is located on chromosome 9 and has three alleles, A, B and O. The A allele encodes a glycosyltransferase that adds N-acetylgalactosamine to the glycoprotein H antigen that is expressed on all normal red cells.
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Te answer would be <span>C. "Some mutations can be contagious, like infections.</span>" Mutations happen regularly and are often so subtle that we do not notice them on a daily basis. Some of them, however, can indeed cause harm.