At this point esch chromosome consist of a pair of chromatids and the two associated chromosomes are termed a tetrad.此时每条染色体由一对染色单体构成,这两条联合的染色体称为四分体.The Y chromosome is starting to yield other intriguing tales as well.Y染...
I always thought that was hooey.我一直认为这是骗人的.My cousin Billy Bob, who was a mean little runt, said it was a lot of hooey, there was no such creature.我的表弟比利·鲍勃,一个可恶的小矮个,说那全都是胡说,根本没有这样的事。That's a lot of hooey!那都是胡说八道!Th...