>>> 哲学 经济学 法学 教育学 文学 历史学 理学 工学 农学 医学 军事学 管理学 旅游学 文化学 特色库
搜索结果: 1-11 共查到Sex Determination相关记录11条 . 查询时间(0.14 秒)
There are only two known methods for determining the sex of Ips typographus (L.) – dissection that cannot be used with live beetles and by distinguishing between the density of the hairs on the head, ...
The aim of this study was to evaluate conception rate after sex determination and subsequent freezing of Day 7 (D7) bovine embryos and to compare it with transfer of fresh female embryos. High quality...
The aim of this study was to evaluate the effect of sex determination procedures in Day 7 to Day 8 bovine embryos of various quality. For the purposes of comparison we used high quality (HQ) as well a...
Determination of sex origin of cattle meat by fast and reliable molecular methods is an important measure to ensure correct allocation of export refunds particularly in European countries and also fem...
Sexually reproducing populations with small number of individuals may go extinct by stochastic fluctuations in sex determination, causing all their members to become male or female in a generation. In...
The separation of X and Y chromosome-bearing sperm is of use in many aspects of livestock maintenance. In this study, we sought to determine the difference in DNA content between X- and Y-bearing sper...
The aim of this study was to evaluate the efficiency of sex determination after microsurgical splitting of D7 (Day 7) bovine embryos and to test the conception rate after subsequent transfer of fema...
鸟类的性别决定是一个多基因参与的级联调控过程。这一过程受Z染色体连锁的DMRT1基因, W染色体连锁的PKC1W和其它多种因子共同调控。本文综述了性别决定基因及其功能、性别鉴定方法等方面的研究进展。 Avian sex determination is a multiple gene regulation cascade. Genes such as the Z chromosome-link...
黑腹果蝇(Drosophila melanogaster)和秀丽隐杆线虫(Caeborhabditis elegans)的性别决定的问题已研究得比较详细,且transformer基因是这两种生物性别决定中最重要的基因之一,其有关的性别决定研究在近几年取得了很大的进展。本文就线虫和果蝇的transformer基因及其相关基因的特性与功能进行了特别介绍,并在此基础上对其性别决定的分子机制进行初步的比较...
In the crustacean Gammarus duebeni, sex is determined by the interaction of a number of environmental, genetic and parasitic factors, which may, in turn, influence sex ratios and population dynamics. ...

中国研究生教育排行榜-

正在加载...

中国学术期刊排行榜-

正在加载...

世界大学科研机构排行榜-

正在加载...

中国大学排行榜-

正在加载...

人 物-

正在加载...

课 件-

正在加载...

视听资料-

正在加载...

研招资料 -

正在加载...

知识要闻-

正在加载...

国际动态-

正在加载...

会议中心-

正在加载...

学术指南-

正在加载...

学术站点-

正在加载...