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Hello Class, I am Professor Pickle Von Schnitzel, but you can call me Professor Pickle. Today we are going to learn all about Meiosis. Firstly, let's start off with vocabulary words and their functions.
Gamete: A mature haploid male or female germ cell which is able to unite with another of the opposite sex in sexual reproduction to form a zygote. Haploid: Having a single set of unpaired chromosomes. Diploid: containing two complete sets of chromosomes, one from each parent. Reduction Division: The first cell division in meiosis, the process by which germ cells are formed Homologous Chromosomes: chromosome pairs (one from each parent) that are similar in length, gene position, and centromere location. Crossing over: the exchange of genes between homologous chromosomes, resulting in a mixture of parental characteristics in offspring.
sister chromatids: identical copies (chromatids) formed by the replication of the chromosome, with both copies joined together by a common centromere. chromosome: a thread-like structure of nucleic acids and protein found in the nucleus of most living cells chromatin: the material of which the chromosomes of organisms other than bacteria (i.e. eukaryotes) are composed, consisting of protein, RNA, and DNA. centromere: the region of a chromosome to which the microtubules of the spindle attach
Now that we've learned all the vocabulary, let's go through the stages of Meiosis. Before entering meiosis I, a cell must first go through interphase. the cell grows during the G1 phase, copies all of its chromosomes during S phase, and prepares for the division during G2 Phase.
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