3 ms·
They swabbed them and sequenced their DNA.
by joss82 6mo ago
They swabbed them and sequenced their DNA.
- dundarious 6mo agoThank you, I forgot that's cheap enough these days.
- tsimionescu 6mo agoThat just moves the question to how they figured out the genetic sex determination system of eels, or even how they figured out that sex is genetically determined in eels (and is it? many vertebrates don't have genetically determined sex).