Sentences with phrase «reproductive tract traits»
Almost nothing is known about what determines the sperm's fate in hybrid matings where there may be an evolutionary mismatch between ejaculate and female reproductive tract traits.
https://www.sciencedaily.com/ Not exact matches
Those dinosaurs close to the ancestry of birds shared some of these traits, but they had two functional reproductive tracts, and their eggs were smaller relative to their body size and more elongated than those of modern birds.
«Crazy sperm forms are evolving because female reproductive tracts are evolving that bias fertilization in favor of these weird, specific traits,» Pitnick says, pointing to a female's active role in selecting preferred sperm after mating.