At the conclusion of mitosis, each daughter cell has __?

Sam is correct. Unfortunately the other two respondents are also correct. Questions about mitosis and meiosis are the most frequently flawed questions i see on yahoo. Before mitosis occurs the cell will double its DNA content to prepare for division. It will also increase its cytoplasm content prior to division. After division the cytoplasm must be split in half. The function of mitosis is to create two identical daughter cells that are genetically identical to the parent cell. This does not mean that the same amount of DNA was present in the parent cells and daughter cells. Genetically identical means that they contain the same information, it does not refer to the number of DNA molecules present. So yes, b is correct, the daughter cells must be genetically identical to the parent cells. Unfortunately, "a" must also be correct. If the parent cell did not have twice the DNA content the daughter could not be identical to the parent cell. A chromosome is a chromosome regardless of the number of chromatids it consists of. The number of chromatids present on a chromosome indicate the DNA content, which is halved at the end of mitosis. If you're only allowed 1 answer I would choose B. B must be correct. Often cytokinesis is not considered a part of mitosis, meaning that the division of cytoplasm is not actually part of mitosis. This could discount choice "a", but that's tricky if your teacher/prof was testing you on that, that's just semantics. hope this made sense.