Meiosis

Mitosis and meiosis are forms of cell division that produce daughter cells containing genetic information from the parent cell. Mitosis is the division of the genetic material in the nucleus which is immediately followed by cytokinesis. On the other hand, meiosis occurs in sexually reproducing organisms and this type of cell division reduces the sets of chromosomes from two to one in gametes. Both mitosis and meiosis differ, however, both processes result in daughter cells forming. In the end of…

he two processes of nuclear division are similar as in they allow cells to divide and reproduce, but they also have many differences. Meiosis is the type of nuclear division that occurs in sexually reproducing organisms. In meiosis, the diploid number of chromosomes is reduced to the haploid number. Gametes have the haploid number, while zygotes have the diploid number. The homologous chromosomes that appear in the zygote look alike and have the same length and centromere position, but the…

and NPD. For wild and tan no crossing occurred 19 times in meiosis I and crossing occurred 38 times in meiosis II. Therefore, at the end of the experiment it was determined that the tan and…

Introduction Evolution Canyon is a canyon in Israel where the two slopes face very different conditions. The Northern Facing Slope (NFS) is lush, green, and shaded while the Southern Facing Slope (SFS) is dry and has little protection from intense sunlight. Evolution Canyon is a natural laboratory, meaning that nature has provided variations, allowing it to be a great location for experiments. Specifically, it is a great location to study natural selection and evolution. Researches from the…

Genetics To Down Syndrome Genetics describes the makeup of our cells, genes, chromosomes, and phenotypes. When there is alter in a gene or a duplication of a chromosome, it can lead to a certain diseases. One of the main diseases known today from a duplication of a chromosome is Down syndrome. John Down first put a name to Down syndrome in 1866, but artifacts from Mexico and Saxon documented some cases of Down syndrome in individuals, and also some were found in paintings of the Renaissance in…

ABSTRACT: The purpose of this lab is to describe possible genotypes of corn and plants in procedure 17.2, and find their color and height ratio; in procedure 17.3 codominance will be observed in human blood, and the blood types of unknown samples will be determined. In procedure 17.4, Rh positive and Rh negative will be tested for in blood samples. A unit of heredity on a chromosome is called a gene. Mendel’s particulate theory states that offspring have characteristics inherited from their…

Background Cells divide in two ways, mitosis and meiosis. Mitosis is used to produce cells that are genetically identical to the parent cell for growth, asexual reproduction, or repair after injury. Cells that are produced by mitosis are diploid, meaning that they have two complete sets of chromosomes, one from each parent. Meiosis is used to produce haploid cells that have only one set of chromosomes, a mix of chromosomes from both parents. Meiosis produces cells that are genetically…

organism called a zygote. During meiosis, one diploid cell divides and makes four haploid sex cells. Meiosis has two divisions of the cytoplasm and the nucleus, the divisions are called Meiosis I and Meiosis II. Reproductive cells go through interphase before meiosis. “ A reproductive cell goes through interphase before beginning meiosis”.p.238 para 1 . There are four phases of meiosis 1, which are prophase 1, Metaphase 1, Anaphase 1 , and Telophase 1. For Meiosis 2, it also has four phases,…

Polyploidy refers to the individual with presence of more than two sets of chromosomes (3n, 4n, 5n, etc.) (Soltis et al., 2009) as sporophyte. Polyploids may have arisen as the result of nondisjunction during meiosis or may be generated when chromosomes are dividing properly in mitosis and meiosis, but the cytokinesis does not follow. Polyploidy can be classified into two: polysomic polyploidy (autopolyploidy) and disomic polyploidy (allopolyploidy) (Stebbins, 1951). Autopolyploidy comes from…

development and replaces old and worn-out cells throughout your life. Mitosis’ goal is to produce daughter cells that are genetically identical to their mothers and have two sets of chromosomes. Mitosis produces 2 diploid cells. Both mitosis and meiosis are processes of cell division. They have the same steps for cell division, prophase, metaphase, anaphase, and telophase. The stages of which are interphase, prophase, metaphase, anaphase, and telophase. During prophase, chromatin condenses…