The process that reduces the number of chromosomes in half is called Meiosis
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Nothing
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Answer:
Instead of a brain, echinoderms have a ring of nerves located around their mouth area that governs their nervous responses. This ring coordinates their motion, their eating, basically anything that requires nerve control.
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in the cell nucleus
Explanation:
Most DNA is located in the cell nucleus where it is called a nuclear DNA.
These alternative genes are called alleles
