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When sperm and egg cells undergo meiosis, the number of chromosomes goes from to . When an egg is fertilized by a sperm cell that number goes from to . 2 to 2; 1 to 1 1 to 1; 2 to 2 1 to 2; 2 to 1 2 to 1; 1 to 2
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The part of the eye that closes and opens to let light in is .
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When sperm and egg cells undergo meiosis, the number of chromosomes goes from to . When an egg is f...
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