Imagine that an animal cell is treated and G2 with the tocsin that prevents poly
ID: 189928 • Letter: I
Question
Imagine that an animal cell is treated and G2 with the tocsin that prevents polymerization of actin into microfilaments at what subsequent stage of the cell cycle probably be disrupted? 10. Imagine that an animal cell is treated in G2 with a toxin that prevents polymerization of actin into microfilaments. At what subsequent stage would the cell cycle probably be disrupted? Explain your answer. Consider the same situation, but now the toxin prevents polymerization of tubulin into microtubules. How might the cell cycle be disrupted? 11. A chicken has 78 chromosomes in its somatic cells. How many chromosomes did the chicken inherit from each parent? How many chromosomes are in each of the chicken's gametes? How many chromosomes will be in each somatic cell of the chicken's offspring?Explanation / Answer
10) The animal cell cycle can be divided into different stages like, G1 phase, S phase, G2 phase,M pahse or Mitotic Phase and finally Cytokinesis where a cell divides into two daughter cells. The mitotic phase has different stages as follows:
Prophase, Metaphase, Anaphase and Telophase
When a cell is applied with a toxin that prevents polymerization of actin to microfilaments, Cytokinesis stage is inhibited. It is because, the polymerization of actin is required for the formation of cell cytoskeleton, which is essential in dividing a cell into two daughter cells. Hence, anything that is toxic which inhibits actin polymerization, inhibits Cytokinesis stage.
The same toxin when applied in G2 but when prevents,tubulin polymerization to microtubules, cell cycle arrests at Metaphase stage. It is because, in metaphase stage, the chromosomes get arranged in equitorial plate and microtubules get attached to the kinetochores of the chromosomes so that they can be seperated into two poles during Anaphase. As this doesnot proceeds without Microtubules, the cell cycle gets arrested in Metaphase stage of Mitossis.
11) Chicken inherits 39 chromosomes from each parent ( ie, Half of 78 from father and other half from mother).
In chicken gamete there will be 39 chromosomes ( since, it should combine with other gamate of 39 chromosomes to ensure the diploid chromosome number of 78).
Each somatic cell of chicken will be in diploid condition,ie., 78 chromosomes.