Well, I don't fully understand your question. I think I know what you're getting at though.
In a system of sexual reproduction, you have genes coming from both an egg and the sperm. Therefore, it'll only contain half the total amount of chromosomes (46 in humans). A sperm will have 23, and the egg will have the other 23. Is that what you meant why the chromosomes are cut out in pairs? If that wasn't your question, please elaborate and I'll return to answer it to the best of my capabilities.
Answer:
Cochlea
Cochlea a coiled, bony, fluid-filled tube in the inner ear through which sound waves trigger nerve impulses. Inner ear the part of the ear, containing the cochlea, semicircular canals, and vestibular sacs.
Explanation:
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In the second cycle of what?
The answer to this question would be B
