英文: But in addition to confirming previous findings, the nontaster form helps to answer one of modern anthropology's most controversial questions: As our Homo sapiens ancestors spread across the world, did they interbreed
with the more archaic hominids they m
中文: 这个苦味基因的突变除了可验证过去的发现外，还解开了现代人类学中最具争议的问题：现代智人的祖先扩散到世界时，是否和他们在欧洲和亚洲遇到的其他古代人猿类繁衍后代？ 更详细...
英文: Over time the groups diverge to the point that they can no longer interbreed
if they are later brought together.
中文: 过了一段时间之后，两群累积的遗传差异达到了即使相遇也无法混血的程度。 更详细...
英文: Related species that are not geographically isolated, and which could interbreed
but in practice do not because of differences in behavior, breeding season, etc., are called sympatric species.
中文: 两个或更多相关物种之间无法互相杂交是因为地理隔离，这样的物种被称为异地种。 更详细...