Marine Reserve Field Study
Meiosis is a process in which each parent has two sets of genes and each organism inherits a single copy of every gene from each parent. The two sets of genes must be separated so that each gamete ends up with just one set. Meiosis involves two divisions, Meiosis I and Meiosis II. By the end of meiosis II, the diploid that entered meiosis has become four haploid cells. In Interphase I, the DNA replicates while in Prophase I, chromosomes pair with corresponding homologous chromosomes to form a tetrad which has four chromatids. This is also the phase where crossing over occurs. In Metaphase I, spindle fibers attach to the chromosomes and in Anaphase I, the fibers pull homologous chromosomes toward opposite ends of the cell. Lastly, in Telophase I and Cytokinesis, nuclear membranes form and the cell separates into two genetically different cells. In Meiosis II, the two cells produced by Meiosis I divide again and the chromosomes are not copied before this division. The chromosome number is cut in half to be haploid and the result of this process is four haploid gamete cells that may be genetically different.
I enjoyed doing this project because it allowed me to become familiar with technology and PowerPoint to create the meiosis animation. I was visually able to see the different phases and it allowed me to understand what occurs in each phase. Overall, I gained a better-detailed understanding of the different phases occurring in meiosis.
- To view this Prezi, click here.