go to jove.com

HIGH SCHOOL

Biology

Science Experiments

Basic Biology

This is a free preview. For full access

Biology I: yeast, <em>Drosophila</em> and <em>C. elegans</em>

Yeast Budding and Genetic Variation

Description

Yeast cells reproduce by budding and can also switch to sexual reproduction. Saccharomyces cerevisiae is a unicellular eukaryote, so it carries out many of the same basic biological processes seen in humans. Scientists use it as a model organism to study how cells grow and divide.

Asexual reprodu...

Transcript

尽管只是简单的单细胞真核生物,酿酒酵母同样具有同高等真核生物类似的细胞周期以及其它的细胞进程。因此酿酒酵母是生物学研究的重要模式生物。在酵母的细胞周期中,细胞生长和分裂是紧密关联的,并且受诸多因素,如营养物浓度的调控。受外界环境的刺激, 酵母可以选择进行无性或有性生殖产生新的细胞。本短片将给大家介绍酵母细胞周期以及酿酒酵母不同生殖方式。

首先快速重温一下关于细胞周期的知识。细胞周期由分裂间期和有丝分裂期,也称M期构成。分裂间期可进一步细分为G1期,S期和 G2期。众所周知,有丝分裂是细胞分裂的重要环节。酵母除了能进行有丝分裂外,还能通过其特有的无性生殖进行不对称地分裂, 也称芽...

More videos by Standards