1. In a diploid organism of 2n = 10, assume that you can label all the centromeres derived from its female parent and all the centromeres derived from its male parent. When this organism produces gametes, how many male- and female-labeled centromere combinations are possible in the gametes? 2. Human cells normally have 46
What is mitosis? What are the stages of mitosis? What happens in each stage?
HeLa cells (a strain of human cells cultured in the laboratory) have a mitotic cycle of about 24 hours, of which about 11 hrs is spent in G1, about 8 hrs in S, about 4 hrs in G2, and about 1 hr in mitosis. If you took a sample of HeLa cells from a culture, and looked at it through the microscope, in about what % of cells would y
1. Of what subunits are microtubules composed? 2. Of what subunits are microfilaments composed? 3. If the microfilaments are disrupted, what will be the effect on the cell shape? On the organization of the golgi? On mitosis? 4. If microtubules are disrupted what will be the effect on the cell shape? On the organi
Please answer the following questions (attached). --- LAB-9-A 1- What condition appears to be required for the movement of chromosomes during mitosis 2- What event determines when a chromatid becomes a chromosome? 3- A certain cell has eight chromosomes before cell division has started. How many chromosomes will there
The eukaryotic cycle is explained in detail
I scanned chapter questions that include diagrams from my text book. Please assist. Cytokinesis - the actual process of cell division - has attracted theorists for well over 100 years. Indeed, it has been said that all possible explanations of cytokinesis have been proposed... (please see attached).
Given a plant species A with a diploid number of 10 and a plant species B with a diploid number 0f 18, I describe how new polyploid species C could arise in a single generation from hybridization between A and B. I also describe the process (including cell division events) and tell what the probable diploid number of C would be.
I understand that, in a diploid animal cell, during metaphase of mitosis the chromsomes are aligned along the equator of the cell and, during metaphase 1 of meiosis the homologous chromosomes are drawn into pairs and then aligned along the equator of the cell. (i) What is the significance of the different positions of the chr
Please provide a simple explanation of the process of nucleus division.
1. ____________or___________: Cell growth and protein production stop at this stage in the cell cycle. All of the cell's energy is focused on the complex and orderly division into two similar daughter cells. Mitosis is much shorter than interphase, lasting perhaps only one to two hours. As in both G1 and G2, there is a Checkpoin
A woman is know to be carrying a severe recessive autosomal gene. It is possible to determine whether a cell or poloar body is carrying the normal or dissorder recessive. The detection procedure destroys the ovum. She has opted for in vitro fertilization so the the egg and sperm can be united in a test tube. To avoid havin
1. You started life as a single cell, Remember Virchow's statement that all cells come from pre-existing cells. Where did your original Cell come from? 2. Where did your parent's cells come from? 3. Your body is now composed of trillions of cells. Where did the rest of your cells come from? 4. If all cells come
I describe a cell cycle and name the stage at which the chromosome content gets doubled. What is the difference between homologous chromosomes and sister chromatids?
Describe what happens during the following 4 stage of mitosis: -prophase -metaphase -anaphase -telophase
Suppose that meiosis occurs in the transient diploid stage of the cycle of a haploid organism of chromosome number "n". What is the probability that an individual haploid resulting from the meiotic division will have a complete parental set of centromeres (that is, a set all from one parent or all from the other parent)?
The drug taxol, extracted from the bark of yew trees, has the opposite effect of the drug colchicine, an alkaloid from autumn crocus. Taxol binds tightly to microtubules and stabilizes them. When taxol is added to cells, it causes much of the free tubulin to assemble into microtubules. In contrast, colchicine prevents microtubul