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periodic motion is used to measure <u>the interval of time</u><u>.</u>
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Any physical characteristic can be passed on from generation to generation. However, some characteristics are influenced by the environment as well as having a genetic predisposition for that specific trait.
Answer:
An egg or sperm only has half of the parent's sex chromosome pair. An egg will always have an X chromosome, since the woman's sex chromosome pair only has Xs. Sperm can have either an X chromosome or a Y chromosome. If a sperm with an X chromosome fertilizes the egg, the new cell will have two X chromosomes. One came from the father's sperm and one came from the mother's egg. Since the sex chromosome that is made is XX, the cell will grow into a girl baby.
Explanation:
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