rss信息聚合 生物秀旗下生物秀 | 易生物 | 生物秀论坛 | 生物医药词典 | 生物百科 | 生物秀知道 | 人才网 | 生物百科

Grasshopper Spermatogenesis

2010-02-22 19:37:25 来源:易生物实验 浏览次数:0 网友评论 0

Grasshopper Spermatogenesis

Materials

Prepared longitudinal section of grasshopper testis

Microscope

Procedure

1.Place the slide on the microscope and with low power identify the apical end of the testis and the region where the testis joins with the vas deferens. The apical end is round and packed with cells, while the opposite end is a more open cavity lined with formed sperm.

2.Identify the inpidual compartments of the testis, known as cysts. The cysts are separated by connective tissue walls or septa.

3.At the apical end, the cells are grouped into presumptive germ cells known as spermatogonia. These cells are undergoing mitosis and are giving rise to all of the remaining germ cells in the testis. Moving from the spermatogonia in the apical end to the vas deferens at the opposite end of the testis, the cells mature as a group. That is, all of the cells within a given cyst will be in the same approximate stage of meiosis. A good longitutinal section will have nearly all of the stages of meiosis displayed on one section, but you may have to examine several slides to observe all of the stages.

4.Using Figure 11.6 as a guide, identify , draw and label each of the following stages:

Spermatogonia

Primary spermatocytes in the following phases of Prophase I

leptotene

zygotene

pachytene

diplotene

diakinesis.

Secondary spermatocytes

Spermatids

Sperm

易生物实验技术频道 - 生物实验技术资料库!http://shiyan.ebioe.com

细胞实验技术交流论坛:http://bbs.bbioo.com/forum-138-1.html

最新发布产品

[错误报告] [推荐] [收藏] [打印] [关闭] [返回顶部]

  • 验证码:
生物秀主站新闻 实验 专业 人物 下载 视频 图片
易生物主站仪器 试剂 企业 招聘 会议 资讯 人物
[生物部落]记录 日志 群组 相册 分享 我的博客
生物秀知道待解问题 已解问题 实验问 导读 提问
生物秀论坛实验交流 学科专业 群组 前沿 秀学院
PCR实验交流 核酸实验交流 蛋白实验交流 一起读新闻 细胞实验交流 免疫实验交流 文献互助 回答问题!

最新图片文章

最新文章

相关文章

 
*×
易生物VIP企业推荐