Mitosis and Meiosis I. These two processes function to pass chromosomes from one cellular generation to the next in a very carefully controlled manner. II. Mitosis and Meiosis are both correctly described as nuclear division; they are never correctly called cell division‚ or any kind of reproduction. It is possible (and often quite normal) for nuclei to divide when cells don’t. And organisms reproduce; nuclei and cells divide. III. Mitosis A. Mitosis is the division of a nucleus
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Though the process of reproduction varies slightly through mammals‚ the basic sex cells (gametes) are more or less the same. The male gamete is also known as the sperm cell‚ and the female the ovum. The process the sperm and ovum undergo to create life is both fascinating and detailed. The sperm is produced in the testes. This specialized cell develops through several stages. In the first stage‚ the gamete is called spermatocyte. Each spermatocyte contains forty-six chromosomes (one set of “y” chromosones
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Reproduction in humans Reproduction Reproduction is a characteristic of all living organisms. It is the process that makes more of the same kind of organism. Reproduction is essential in all species to ensure that the species does not extinct. There are two types of reproduction‚ Asexual and sexual reproduction. Asexual Reproduction: Asexual means not sexual. This means that this kind of reproduction does not involve sex. Asexual reproduction is the production of genetically identical offspring from
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COMPETENCIES A) Introduction. 1. What is the correct scientific name of the fern with which you are working? Why is it important for organisms to have scientific names versus common names? 2. Correctly classify the organism. To which kingdom‚ phylum‚ class‚ order‚ family‚ genus and species does it belong? 3. Provide a brief morphological description of the adult sporophyte generation of this genus. Be use to include both vegetative and reproductive structures. In what part of the world
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Gametes are sex cells. Fertilisation is when half the genetic material comes from male gamete and half come from female gamete and they fuse together to form a zygote. Zygote is a fertilized egg. Embryo is a divided zygote. Binary Fission in Bacteria Bacteria are microscopic organisms made up of one cell and they do not have a nucleus but a loop of DNA. When bacteria‚ reproduce asexually the DNA loop is copied so that there is some for each new cell. The bacterial cell deivides into two by
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adding water we observed small black dots moving around rapidly‚ almost “dancing”. From class notes I realized the sperm were seeking out eggs for fertilization. After a while the movement seemed to slow down as the destination was reached and the gametes were soon to
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diploid in your answer. A: Cells in the begining of meiosis has diploid cells‚ with a full amount of chromosomes. In the end of meisos‚ the four genetically different daughter cells are haploid (gametes)‚ they have half the number of chromosomes. Because of this‚ they are able to fuse with other gametes (ex. egg and sperm) to form a zygote‚ which is a diploid cell with the full number of chromosomes. 2. What is the dignificance meiosis to sexual reproduction? A: The genetic diversity brought
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paired females initiate male spawning‚ by spawning first. The males have a lower gonad volume when compared with the females. This results in high efficiency fertilization because it does not require large amounts of male gametes to be released for fertilization. Lower male gamete production is though to be caused by the higher mobility during mating season‚ which strains energy reserves. The fertilized eggs then free float in the oceanic currents until birth. Starfish have proven to be very diverse
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of cell division that produces haploid gametes in diploid organisms. Mitosis and meiosis are two very different processes. While meiosis only requires the cell to divide twice‚ the cell only divides once during mitosis. This causes meiosis to produce four cells and mitosis to produce two cells. Mitosis occurs in the body and meiosis occurs in the sex organ of organisms. The two processes produce different things. Meiosis produces haploid cells‚ gametes and genetically unique cells. Mitosis produces
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PROBABILITY and MENDELIAN GENETICS LAB Hypothesis: If we toss the coin(s) for many times‚ then we will have more chances to reach the prediction that we expect based on the principle of probability. Results: As for part 1: probability of the occurrence of a single event‚ the deviation of heads and tails of 20 tosses is zero‚ which means that the possibility of heads and tails is ten to ten‚ which means equally chances. The deviation of heads and tails of 30 tosses is 4‚ which means that the
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