e) There would be no effect on meiosis if shugoshin is not degraded. There are three major, distinct groups of organisms: bacteria, archaea, and eukaryotes.
What might happen if shugoshin does not break down after anaphase I?
Shugoshin does not break down after anaphase I of meiosis. … If shugoshin is absent during meiosis, the cohesin at the centromere could be broken, allowing for the separation of sister chromatids during anaphase I. c. If shugoshin is not broken down, the cohesin at the centromere will remain protected from degradation.
What is the function of shugoshin?
The protein, Shugoshin, is actually Japanese for guardian spirit. Just as its name suggests, the Shugoshin protein guides chromosome cohesion during cell division. It does this by preventing the cohesin complex, which regulates chromatid separation, from prematurely dissociating.
What would be the consequences to the outcome of meiosis if shugoshin is absent during meiosis?
What would be the consequences to the outcome of meiosis if shugoshin is absent during meiosis? … Homologous pairs and sister chromatids would fail to separate during both meiosis and mitosis. A cell in prophase II of meiosis contains 12 chromosomes.
What might happen if there will chromosomes does not undergo meiosis?
Because meiosis creates cells that are destined to become gametes (or reproductive cells), this reduction in chromosome number is critical — without it, the union of two gametes during fertilization would result in offspring with twice the normal number of chromosomes!
Can you think of any reasons for the fact that most mules are sterile?
Can you think of any reasons for the fact that most mules are sterile? The haploid egg produced by the female horse contains 32 chromosomes. … Because an odd number of chromosomes in the mule’s cells are present, at least one chromosome will not have a homolog.
What phase is Shugoshin most important?
The results show that shugoshin protects the centromeric SC in meiotic prophase and, in anaphase, promotes the proper segregation of partner chromosomes that are not linked by a crossover. Faithful chromosome segregation during meiosis depends upon the formation of connections between homologous chromosome pairs.
What does kinetochore mean?
Definition. The kinetochore is a protein complex assembled on the centromeric region of DNA. It provides the major attachement point for the spindle microtubules during mitotic or meiotic division to pull the chromosomes apart.
What are the consequences of meiosis?
Segregation of the homologues and recombination in meiosis have important genetic consequences. From the genetic view point, meiosis is a mechanism for distributing the genes between the gametes, allowing their recombination and random segregation.
What can happen if meiosis goes wrong?
Errors during meiosis can alter the number of chromosomes in cells and lead to genetic disorders.
What are the consequences of mitosis?
Mistakes during mitosis lead to the production of daughter cells with too many or too few chromosomes, a feature known as aneuploidy. Nearly all aneuploidies that arise due to mistakes in meiosis or during early embryonic development are lethal, with the notable exception of trisomy 21 in humans.