英语释义

1. a group or arrangement of four: such as

2. a group of four cells produced by the successive divisions of a mother cell
a tetrad of spores

3. a group of four synapsed chromatids that become visibly evident in the pachytene stage of meiotic prophase

4. a group or arrangement of four: as

5. a tetravalent element, atom, or radical

6. a group of four cells arranged usually in the form of a tetrahedron and produced by the successive divisions of a mother cell
a tetrad of spores

7. a group of four synapsed chromatids that become visibly evident in the pachytene stage of meiotic prophase and are produced by the longitudinal splitting of each of two paired homologous chromosomes

片语

local moving tetrads局部活动标架

linear tetrads线形四分体

Tetrads Drop Lite俄罗斯方块

ordered tetrads顺序四分子

orchered tetrads顺序四分子在链孢霉的子囊中减数分裂的产物子囊孢子按一定顺序排列

tetrads analysis四分子分析

null tetrads零标架

Tetrahedral tetrads四合体花粉

Forming Tetrahedral Tetrads产生四面体排列型

英汉例句

• The results showed that the type of microsporic tetrads of the simple flower is belong to tetrahedral type and the mature pollen is two-celled with bristles on the surface.

  单瓣紫花木槿的小孢子母细胞经过减数分裂形成四面体状的四分体，成熟花粉是二细胞型花粉，圆球型，表面有刺毛。

• The microspore mother cells give rise to isobilateral tetrads by meiosis. Cytokinesis is successive. The mature pollen grains are 2-celled and are shed singly.

  小孢子母细胞经减数分裂形成左右对称型四分体，胞质分裂为连续型，成熟花粉粒为2-细胞型；