how many chromosomes from each pair of homologous chromosomes does a gamete have?
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Human somatic cells have 46 chromosomes consisting of two sets of 22 homologous chromosomes and a pair of nonhomologous sex chromosomes. This is the 2n, or diploid, state. Human gametes have 23 chromosomes or one complete set of chromosomes.
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The 46 chromosomes of a human cell are organized into 23 pairs, and the two members of each pair are said to be homologues of one another (with the slight exception of the X and Y chromosomes; see below). Human sperm and eggs, which have only one homologous chromosome from each pair, are said to be haploid (1n).
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A human's 46 chromosomes can be grouped into 23 pairs of chromosomes called... homologous chromosomes. similar in shape and size, and that the two chromosomes carry the same gene.
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Since gametes are sex cell , egg or sperm, formed by meiosis they have only one set of chromosomes and therefore they do not contain homologous chromosomes.
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Body cells make up the body of the organism, while gametes are sex cells that could be either a sperm or an egg cell. What does homologous mean? It means that each of the 4 chromosomes from one parent has a corresponding chromosome from the other parent.
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In Humans. As with the simple hypothetical organism above, humans also have homologous chromosomes. One half of each pair comes from our mother, while the other comes from our father. These chromosomes are carried in the haploid gamete cells, sperm and eggs.
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The DNA sequences of homologous chromosomes are usually not exactly identical. The nuclei of most human cells contain 46 chromosomes. These 46 chromosomes consist of 23 pairs of homologous chromosomes, or homologs, meaning each of these pairs are alike, but not necessarily identical.
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Each pair of chromosomes comprises one chromosome inherited from the father and one inherited from the mother. For example, in humans, somatic cells contain 46 chromosomes organized into 23 pairs. By contrast, gametes of diploid organisms contain only half as many chromosomes.
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46 chromosomes forming 23 pairs of homologous chromosomes. length, centromere position, and staining pattern. The two chromosomes of a matching pair in which each chromosome carries genes controlling the same inherited characteristics. Two chromosomes of a homologous pair may have different versions of the same gene.
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Therefore, meiosis results in four haploid genetically unique daughter cells, each with half the DNA of the parent cell (Figure below). In human cells, the parent cell has 46 chromosomes (23 pairs), so the cells produced by meiosis have 23 chromosomes. These cells will become gametes.
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In eukaryotes These tables give the total number of chromosomes (including sex chromosomes) in a cell nucleus. For example, most eukaryotes are diploid, like humans who have 22 different types of autosomes, each present as two homologous pairs, and two sex chromosomes. This gives 46 chromosomes in total.
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In humans, the male gamete is called sperm, and the female gamete is called an egg. When the gametes join they form a cell called a zygote. Human sperm and eggs contain 23 chromosomes. Human zygotes contain 46 chromosomes.
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These pairs of chromosomes are known as homologous chromosomes, or homologues. ... In humans, a zygote contains 23 pairs (or two sets) of chromosomes. Any cell containing two sets of chromosomes is said to be diploid. The zygote forms from the fusion of two haploid gametes.
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There are two possibilities for orientation at the metaphase plate; the possible number of alignments therefore equals 2n, where n is the number of chromosomes per set. Humans have 23 chromosome pairs, which results in over eight million (223) possible genetically-distinct gametes.
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As given above, gametes are by definition haploid, regardless of the actual number of sets of chromosomes they contain. An organism whose somatic cells are tetraploid (four sets of chromosomes), for example, will produce gametes by meiosis that contain two sets of chromosomes.
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Humans have a total of 46 chromosomes, but there are only 22 pairs of homologous autosomal chromosomes. ... The 22 pairs of homologous chromosomes contain the same genes but code for different traits in their allelic forms since one was inherited from the mother and one from the father.
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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.