how many unique gametes could be produced by an individual with the genotype aabbccddee?
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The number of different possible gametes produced by the diploid genotype (AaBbCcDdEe) is 2 x 2 x 2 x 2 x 2 = 32 (2 for each pair of heterozygous genes).
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Human somatic cells have 46 chromosomes, including 22 homologous pairs and one pair of nonhomologous sex chromosomes. This is the 2n, or diploid, condition. Human gametes have 23 chromosomes, one each of 23 unique chromosomes. This is the n, or haploid, condition.
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Fruit fly gametes each have four chromosomes, representing 24 or 16, possible chromosome combinations.
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The total possible number of different gametes is 2n, where n equals the number of chromosomes in a set. In this example, there are four possible genetic combinations for the gametes. With n = 23 in human cells, there are over 8 million possible combinations of paternal and maternal chromosomes.
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In case of humans , there are 46 chromosome (2n) in each somatic cell .. during fertilization, two types of haploid ( n = 23 chromosome ) gametes ( sperm and ovum) fuse together to form a zygote(46 chromosomes) inside the female's body , that further develops produce an embryo.
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['Crossing over (in prophase I)', 'Random assortment of chromosomes (in metaphase I)', 'Random fusion of gametes from different parents.']
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Simply place a 2 above each heterozygous gene pair and a one above each homozygous gene pair. Then multiply the numbers together to obtain the total number of different possible gametes.
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By the end of meiosis, the resulting reproductive cells, or gametes, each have 23 genetically unique chromosomes. The overall process of meiosis produces four daughter cells from one single parent cell. Each daughter cell is haploid, because it has half the number of chromosomes as the original parent cell.
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In a human egg or sperm, there are 23 chromosomes, one of which is an X or Y.
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For a human, n = 23, so there are 223, or about 8 million, possible chromosome combinations! The number of different chromosome combinations in gametes is one factor that contributes to genetic variation.
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In humans, gametes are haploid cells that contain 23 chromosomes, each of which a one of a chromosome pair that exists in diplod cells. The number of chromosomes in a single set is represented as n, which is also called the haploid number. In humans, n = 23.
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Because they are produced by mitosis, primary spermatocytes, like spermatogonia, are diploid and have 46 chromosomes. Each primary spermatocytes goes through the first meiotic division, meiosis I, to produce two secondary spermatocytes, each with 23 chromosomes (haploid).
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Answer: (a) Ovary - Diploid, (b) Anther - Diploid, (c) Egg - Haploid, (d) Pollen - Haploid, (e) Male gamete - Haploid, (f) Zygote - Diploid.
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In theory, this would create four haploid gametes from a single diploid cell, like it does during spermatogenesis. However, this isn't the case for human female gametes. Let's go through the process of oogenesis to see how this works and how many haploid gametes are made from a diploid cell.
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During fertilization, gametes from the sperm combine with gametes from the egg to form a zygote. The zygote contains two sets of 23 chromosomes, for the required 46.
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Telophase II and Cytokinesis In humans, meiosis produces genetically different haploid daughter cells, each with 23 chromosomes that consist of one chromatid.
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As a result, two gametes virtually never have exactly the same combination of chromosomes. Each chromosome contains dozens to thousands of different genes. The total possible combination of alleles for those genes in humans is approximately 70,368,744,177,664.