Genetic Remixing in Sexual Reproduction
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Video Transcript
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Your DNA literally remixes itself so you do not look exactly like your siblings.
It is called meiosis and it is the only reason sexual reproduction works. Unlike normal body
cells that just clone themselves, sex cells need to cut their chromosome count in half,
from 46 down to 23. The cell divides twice, but the crazy part
happens first. Chromosomes from your mom and dad actually pair up and swap sections
of DNA. This crossing over creates a totally unique genetic combo. It results in four
distinct cells, so when sperm meets egg, the math adds up perfectly to create
a one of a kind human.
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