The microlamellae appear conical and join to a meshwork of microfilaments at their apices. Further toward the polar regions the microfilaments join with microtubules that converge and terminate near the nuclear envelope. During metaphase-anaphase and anaphase the chromosomes are apparently moved by the...
In metaphase, the sister chromatids move towards the opposite poles of the spindle. View Solution Which is unique to mitosis and does not occur in meiosis ? View Solution During meiosis, crossing over occurs between View Solution The events shown below occur during different phases - ...
A、metaphase B、anaphase C、prophase D、synapsis E、none of the above暂无答案更多“Chromosomes become visible during mitotic phase of ___.”相关的问题 第1题 The first stage of mitosis is p___. During this stage, individual chromosomes become visible. 点击查看答案 第2题 mitotic apparatus...
We find that the sex chromosomes are partitioned to a peripheral spindle domain early in prometaphase I and that their segregation can be accounted for mainly by their reorientation from the parallel to the linear configuration, and little by chromosome-to-pole movement. Further, the behavior of...
during Prophase I and Metaphase I. However, these chromosomes are not arranged in the same way as they were during mitosis. Rather than each chromosome lining up individually across the center of the cell, homologous pairs of chromosomes line up together (formingtetrads, also known asbivalents)...
Human chromosomes during metaphase. Credit: Steffen Dietzel/Wikipedia Chromosomes are responsible for carrying our genes and essentially protecting the information that helps ensure normal, healthy growth, with vital instructions being passed on from cell to cell by a process known as mitosis. While thi...
aSurprisingly, all three were found to be necessary for timely and efficient alignment of the chromosomes during prometaphase. The underlying mechanisms are unknown. 惊奇地,全部三被发现必要的为染色体的实时性和高效率的对准线在prometaphase期间。 部下的机制是未知的。[translate]...
The chromosomes are scattered in the cytoplasm and aged eggs are further arrested at metaphase-III (M-III) like stage without forming pronuclei [2]. The initiation of extrusion of PB-II occurs soon after ovulation and large amount of cytoplasm move towards PB-II area but it never gets ...
3.S Phase: The S phase is where DNA replication occurs. During this phase, each chromosome is duplicated, resulting in two identical sister chromatids. However, at the end of the S phase, the chromosomes are still not separated, so they are still considered as one chromosome with two siste...
In condensin-depleted cells, a chromosome condensation defect was most striking at meiotic metaphase, when chromosomes are normally most densely packaged. Live imaging of meiotic divisions in condensin-depleted cells showed repeated nuclear stretching and contraction as the chromosomes failed to separate....