决定性卵裂 determinate cleavage
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在动物卵裂中,象镶嵌卵那样,其卵裂球未来的发育方向各已决定,这种卵裂称为决定性卵裂。与此相反像调节卵那样,未来的发育方向均未决定,因而产生的卵裂球在发育能力上相互没有差异,这样的卵裂称为非决定性卵裂(indeterminate cleavage)。
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