meiosis造句怎么写

8、Observe the meiosis on the F1 hybrid of Orychophragmus violaceus.

10、The stage in prophase of meiosis during which homologous chromosomes become paired.

12、Generally meiosis occurs before gamete formation, resulting in the gametes being haploid (having half the normal number of chromosomes).

14、The development of a gametophyte directly from a sporophyte without the occurrence of meiosis or spore formation.

16、Our experiments identified that miR-34c may promote meiosis process by interacting with Nanos2 leading up-regulation of Stra8 in mouse spermatogonial stem cells.

18、Synapsis (pairing) the association of homologous chromosomes during the prophase stage of meiosis that leads to the production of a haploid number of bivalents.

20、Failure has often struck at the stage of meiosis, a type of cell division during which paired chromosomes swap DNA and the number of chromosomes per cell is halved.

22、Over four to six weeks, these cells developed and were prompted to undergo the process of "meiosis", which halved the number of chromosomes they carried - a hallmark of sperm.

1、of or relating to meiosis.

3、The separation of homologous chromosomes during meiosis.

5、This means that homologous chromosomes failed to pair together during meiosis and chromosomes formed fewer crossovers, i. e. sites where they recombine, during the initial stages of meiosis.

7、The failure of homologous chromosomes to pair during meiosis.

11、Anaphase The stage in mitosis or meiosis when chromatids are pulled toward opposite poles of the nuclear spindle.

15、In all plants, and in many protists, meiosis results in the formation of haploid cells that can divide vegetatively without undergoing fertilization, referred to as spores.

19、Ubisch bodies and lipid bodies are found in the glandular tapetums. In meiosis of microsporocyte, cytokinesis is is a simultaneous type, which produces an isobilateral tetrad.

23、Potassium antimonate was used to locate calcium in the fertile and sterile anther of a thermo-sensitive genie male-sterile rice at microspore mother cell meiosis stage and at early microspore stage.

4、Reproduction without meiosis or formation of gametes.

9、In meiosis, the association of four homologous chromatids seen during the pachytene stage of prophase.

17、The stage of mitosis and meiosis, following prophase and preceding anaphase, during which the chromosomes are aligned along the metaphase plate.

2、Abnormal meiosis also was observed.

13、In meiosis it is not until anaphase II that the centromere divides, the chromatids being termed daughter chromosomes after separation.

6、A pair of homologous, synapsed chromosomes associated together during meiosis.

21、In meiosis, the pollen mother cells that abnormally acted made up about 10.28% and the male gametophytes abnormally acted at a frequency of 3.2% and mainly aborted at uninucleate stage.