<span>About 50%
Both the mother and father contribute about the same amount of genetic material to their offspring, but it's not quite 50/50. Taking humans as an example, both parents contribute the same amount of genetic material for 22 of the 23 chromosome pairs, but the 23rd pair that determines gender (the X and Y chromosomes) are of different size. So for female children, both parents contribute about the same amount, but for male children, the mother contributes a larger portion since the X chromosome is quite a bit larger than the Y chromosome from the father. Another area in which the contribution differs is the mitochondrial DNA which is contributed solely by the mother. For mammals, this is about 1% of the total genetic material.</span>
The stages of the cell cycle in order are interphase<span>, prophase, </span>metaphase<span>, anaphase and telophase. This process is known as </span>mitosis<span> and is used to generate new cells.</span>
<span>Igneous rocks, which are formed from cooled magma, are first weathered and eroded into small bits. These small bits, called sediment, will sometimes be carried into rivers and will be cemented and compacted together, forming sedimentary rocks.</span>
MJ Schleiden, Theodor Schwann and Rudolf Virchow are credited for the events described in the development of the cell theory.