Navy blue. For other uses, see Navy blue (disambiguation). Navy blue is a very dark shade of the color blue. French sailor in dark blue uniform. Navy blue got its name from the dark blue (contrasted with white) worn by officers in the British Royal Navy since 1748 and subsequently adopted by other navies around the world.
Hybrid sterility is what results when individuals from two. different species are able to mate but their offspring is infertile, meaning that their. offspring are not able to reproduce. Because this occurs after the formation of the. zygote, this is a postzygotic isolating mechanism, not a prezygotic mechanism.
Definition of ZYGOTE INTRAFALLOPIAN TRANSFER. : a method of assisting reproduction in cases of infertility that is similar to gamete intrafallopian transfer but in which eggs are fertilized in vitro and some of the resulting fertilized eggs are inserted into a fallopian tube âabbreviation ZIFT. ADVERTISEMENT. a method of assisting reproduction in cases of infertility in which eggs are obtained from an ovary and fertilized with sperm in vitro and the resulting fertilized eggs are inserted into a fallopian tube by a laparoscopeâabbreviation ZIFT; compare gamete intrafallopian transfer.