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wheatgrass_feetgrass t1_j50jzld wrote

Reply to comment by Claycrusher1 in Given that reproduction is difficult or impossible when both animals have different numbers of chromosomes, how did so many species evolve to have so many different numbers of them? by MercurioLeCher

When you reproduce, your chromosomes are split in half. One gamete will end up with 22 and one with 23. This will only create a viable gamete if the one with 22 includes the extra long boy but more importantly, that the set with 23 doesn't include the extra long boy. Duplicate genes aren't any better. Most trisomy conditions are incompatible with life.

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