ipl-logo

Mitosis Lab Report

1407 Words6 Pages

Eukaryotic cells divide and reproduce in two ways: mitosis and meiosis. Mitosis is a process of nuclear division that chromosomes are separated into two identical sets of chromosomes. The purpose of mitosis is cell regeneration, growth, and asexual reproduction. Meiosis, on the other hand, is a special type of cell division which reduces the chromosome number by half. To achieve halving the genome, DNA replication is followed by two consecutive rounds of nuclear division during meiosis. The purpose of meiosis is to produce gametes for sexual reproduction. Meiotic recombination exchanges the genetic materials between homologous chromosomes. Each of the gamete cells has a unique mixture of maternal and paternal DNA, which results in genetic diversity …show more content…

In meiosis I, sister kinetochores bind to microtubules from the same spindle pole and homologous kinetochores bind to the opposite site. This phenomenon in meiosis I is called mono-orientation and is essential for reducing ploidy of cells. In meiosis II, sister kinetochores bind to the opposite poles like mitosis. If sister kinetochores are attached to microtubules from opposite poles, they would be under tension and all four sister chromatids would remain in the center of the nucleus. Even though arm cohesins could be removed, homologous chromosomes will fail to …show more content…

The core cohesin complex is composed of two structural maintenance of chromosome (Smc) subunits, Smc1 and Smc3, Scc3 and a kleisin subunit Scc1. In mitosis, cohesin provides resistance and generate tension to facilitate the attachment of sister chromatids to microtubules from opposite poles. Cleavage of Scc1 by separase during metaphase to anaphase transition opens the ring and allows sister chromatids separation. However in meiosis, Scc1 is replaced by a meiosis-specific protein Rec8, which changes the regulation of cohesin removal. While all the cohesins are removed during anaphase in mitosis, only the cohesins along chromosome arms are cleaved in meiosis I (Marston

Show More
Related

Nt1310 Unit 1 Writing Assignment

852 Words | 4 Pages

The stages of Meiosis II are: prophase II, metaphase II, anaphase II, and telophase II. Meiosis generates four haploid cells, which begins with the division of one diploid cell. Diploid means having two sets of chromosomes, and haploid means having half the number of genetic information as diploid (or one set). To begin, late interphase is the phase when the DNA in the diploid parent cell is replicated. Then, in prophase I, the chromatin condenses and the chromosomes become visible.

Read More

Nt1310 Lab 1

401 Words | 2 Pages

During random fertilization, no gamete has a greater chance than the other with fusing together in sperm and zygote fusion. These processes contribute to the production of genetic variety because of the many opportunities of unique combinations, unlike the process of mitosis, in which identical daughter cells are always the

Read More

Unit 8 Dna Research Paper

910 Words | 4 Pages

The same region is also amplified on both chromosomes, however they are different sizes, which are then put into gel

Read More

Mitochondria Lab Report

737 Words | 3 Pages

During this experiment, mitochondria were isolated from 20.2 grams of cauliflower using extraction buffer, filtration through Miracloth, and centrifusion. Twelve samples containing various volumes of mitochondrial suspension, assay buffer, DCIP, sodium azide, and citric acid cycle intermediates were prepared to be read by a spectrophotometer. The inclusion of the dye DCIP allowed for the absorbance of the reactions between the mitochondrial suspension and the TCA cycle intermediates succinate, malonate, and oxalate to be measured, as DCIP turns from blue to colorless as the activity of succinate dehydrogenase increases. Experimental Findings Increasing the number of mitochondria in the reaction did increase the reduction of DCIP relative to the amount of mitochondrial suspension present.

Read More

G1 Unit 3 Stages Essay

549 Words | 3 Pages

During the first cycle of replication in meiosis, Prophase is the same but crossing over occurs along side of the nuclear membrane dissolving, chromosomes developing, and the spindle fibers forming. Crossing over is the process in which homologous chromosomes from both parents pair up and exchange DNA. Also during metaphase and anaphase homologous chromosomes are separated and pulled to opposite sides. During this second cycle of replication the cells grows through Prophase II, Metaphase II, Anaphase II, Telophase II, and its final cycle of cytokinesis which is the exact same as during mitosis. I will play a quick review of this process.

Read More

Immunofluorescence Lab

496 Words | 2 Pages

The structure of the cell was very visible when using the anti-tubulin. When observing the anti-actin the microfilaments were visible. The actin filaments were much thinner than those of the microtubules. The actin filaments were best observed in the periphery of the cell compared to those of the tubulin, which are spread throughout the cell because they help stabilize the cell. The TRITC dyed cells depict better the whole structure of the cell, the nucleus is more visible than those that are dyed with FITC.

Read More

Ap Biology Research Paper

1818 Words | 8 Pages

There is only one cell which is able to survive in total of four cell which then develops into a female gametophyte. The pollination occurs in female gametophyte. Fertilization occurs after successful pollination in which one sperm cell will meet with the egg and will make a diploid embryo which will be surrounded by seed coat of tissue from the parent

Read More

6. Explain Why Evolution Often Selects Traits That Promote Genetic Diversity

927 Words | 4 Pages

Extra autosomes and extra or missing sex chromosomes relate to errors in meiosis because they are the result of chromosomes failing to properly separate in meiosis. Deletions, duplications, inversions, and translocations relate to an error in meiosis because they are a consequence of homologous chromosomes failing to align correctly in meiosis or result from errors when crossing over occurs. 8. Could nondisjunction occur during mitosis? Compare and contrast the likely consequence of nondisjunction in mitosis vs.

Read More

Garlic Root Tip Lab Report

1393 Words | 6 Pages

Introduction: This lab report outlines an experiment on the observation of mitosis in the cells of garlic root tips. Mitosis simply put is the division of a nucleus producing two daughter cells with the same number of chromosomes as the parent cell. Miotic cell division consists of five stages: Interphase, Prophase, Metaphase, Anaphase and Telophase. The purpose of this experimet was to identify and observe cells within each stage of mitosis using garlic root tip cells.

Read More

The Cell Cycle: Arby's Story

802 Words | 4 Pages

And the Nucleus disappears. Metaphase is where the Spindle fibers (Any of a network of filaments that collectively form a mitotic spindle (in mitosis) and meiotic spindle (in meiosis). It is chiefly involved in moving and segregating the chromosomes during nuclear division). Are forcing the chromosomes to align at the center of the cell. Anaphase is where the chromosomes move away from one another to opposite poles of the spindle.

Read More

Figure 12.3 Eukaryotic Chromosome

173 Words | 1 Pages

The process of cell division takes has many phases, but the most important part of the cell division makes sure that the genetic information is copied and passed on within every cell. The chromosomes divide, and duplicate themselves during the process of cell division. In eukaryotic cells, the cells create

Read More

Meiosis Lab Report

824 Words | 4 Pages

For sexual reproduction, cells go through meiosis. In the process of meiosis, that is when a cell, specifically a diploid cell which contains two sets of chromosomes, one from the mother, one from the father, divides into two separate cells twice. Thus, resulting in a total of four haploid cells (gametes). In meiosis, there are eight phases total, but are split into two sets of four.

Read More

Spermatogenesis Fertilization

1134 Words | 5 Pages

These move from the outer portion of the seminiferous tubule to a more central location and attach themselves around the sertoli cells. The primary sperm cells then develop somewhat by increasing the amount of cytoplasm and organelles within the cytoplasm. After a resting phase the primary cells divide into a form called a secondary sperm cell. During this cell division there is a splitting of the nuclear material. In the nucleus of the primary sperm cells there are 46 chromosomes; in each of the secondary sperm cells there are only 23 chromosomes, asthere are in the egg.

Read More

Eukaryotic Cell Cycle

1478 Words | 6 Pages

INTRODUCTION To divide, a cell must grow, replicate its genetic material (DNA), and split into two daughter cells. Cells perform these tasks in an organized series of steps that make up the cell cycle. In eukaryotic cells, or cells with a nucleus, the stages of the cell cycle are divided into two major phases: interphase and the mitotic (M) phase. • During interphase , the cell grows and makes a copy of its DNA.

Read More

Essay On Sexual Reproduction

1000 Words | 4 Pages

Sexual reproduction is most common type of reproduction among the plants and animals. They are of following types; 1) Syngamy: The fusion of gametes takes place completely, if male and female gametes are produced by same cell or organism and both gametes fuse together to form a zygote, this is called as Autogamy, paramecium is its example. Another is Anisogamy in which some organisms produce two types of gametes. Both types of gametes differ from each other in their shape and size and are known as an isogametes or heterogametes. Male gametes are motile and small in size and are known as micro gametes.

Read More

More about Mitosis Lab Report

Related Topics

Open Document