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Dr_Vesuvius t1_jbihbun wrote

Reply to comment by EmilyU1F984 in Is there a fertile creature with an odd number of chromosomes? by TheBloxyBloxGuy

From this logic it would follow that in species which don’t use the Y chromosome to determine sex, like birds or crocodilians, we would expect to see different patterns.

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viridiformica t1_jbkeika wrote

Seems like it's still contentious, but since avian sex regulation appears likely to be dependent on having two copies of the Z chromosome to induce maleness, the W chromosome that females have is likely to be analogously expendable to the Y chromosomes - so you would see the same patterns just with the sexes flipped?

https://pubmed.ncbi.nlm.nih.gov/28911174/

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