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Yes, the y chromosome is critical for survival, for males at least. It contains the DNA (or genes) for the genetic make up of a male's body. No, I don't think so because Y chromosomes just dermine the sex. If it was critical to life then no girl would be alive because they don't have Y chromose.

Y chromosome truly determines sex. It contains SRY gene that produces TDF which makes sth to male. it not important for survival, just for prodactivity, since Y has came from X chromosome.

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Related Questions

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