...消失,此类成分含在间隙腺毛内;2、三萜类:蕨烯(羊齿烯fernene)、三萜类:蕨烯(羊齿烯fernenefernene)、贯众烯(Diplotene)等;贯众烯(Diplotene)挥发油:0.04%存在于间隙腺毛中存在于间隙腺毛中。3、挥发油:约0.04%存在于间隙腺毛中。
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N the fourth stage of the prophase of meiosis, during which the paired homologous chromosomes separate except at the places where genetic exchange has occurred 双线期 → see also chiasma, crossing over
Prophase may be divided into successive stages termed leptotene, zygotene, pachytene, diplotene, and diakinesis.
前期可被分为连续的阶段:细线期、偶线期、粗线期、双线期和终变期。
In diplotene the pairs of chromatids begin to separate from the tetrad formed by the association of homologous chromosomes.
双线期时,配对的染色单体开始从四分体中分离,此时常可见染色体交叉。
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