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  2. Karyotype - Wikipedia

    en.wikipedia.org/wiki/Karyotype

    The fundamental autosomal number or autosomal fundamental number, FNa[36]or AN,[37]of a karyotype is the number of visible major chromosomal arms per set of autosomes(non-sex-linked chromosomes). Ploidy. [edit] Ploidyis the number of complete sets of chromosomes in a cell. Polyploidy, where there are more than two sets of homologous chromosomes ...

  3. G banding - Wikipedia

    en.wikipedia.org/wiki/G_banding

    G banding. Schematic karyogram of a human as seen on G banding, with annotated bands and sub-bands. It is a graphical representation of the idealized human diploid karyotype. Each row is vertically aligned at centromere level. It shows 22 homologous autosomal chromosome pairs, both the female (XX) and male (XY) versions of the two sex ...

  4. Genetics of Down syndrome - Wikipedia

    en.wikipedia.org/wiki/Genetics_of_Down_syndrome

    Genetics of Down syndrome. Down syndrome is a chromosomal abnormality characterized by the presence of an extra copy of genetic material on chromosome 21, either in whole (trisomy 21) or part (such as due to translocations). The effects of the extra copy varies greatly from individual to individual, depending on the extent of the extra copy ...

  5. Cytogenetics - Wikipedia

    en.wikipedia.org/wiki/Cytogenetics

    A metaphase cell positive for the BCR/ABL rearrangement using FISH. Cytogenetics is essentially a branch of genetics, but is also a part of cell biology/cytology (a subdivision of human anatomy), that is concerned with how the chromosomes relate to cell behaviour, particularly to their behaviour during mitosis and meiosis. [1]

  6. Human genome - Wikipedia

    en.wikipedia.org/wiki/Human_genome

    Schematic representation of the human diploid karyotype, showing the organization of the genome into chromosomes, as well as annotated bands and sub-bands as seen on G banding. This drawing shows both the female (XX) and male (XY) versions of the 23rd chromosome pair. Chromosomal changes during the cell cycle are displayed at top center.

  7. Polyploidy - Wikipedia

    en.wikipedia.org/wiki/Polyploidy

    Triploid and tetraploid chromosomes are examples of polyploidy. Polyploidy is a condition in which the cells of an organism have more than two paired sets of (homologous) chromosomes. Most species whose cells have nuclei (eukaryotes) are diploid, meaning they have two complete sets of chromosomes, one from each of two parents; each set contains ...

  8. Human genetics - Wikipedia

    en.wikipedia.org/wiki/Human_genetics

    Human genetics is the study of inheritance as it occurs in human beings. Human genetics encompasses a variety of overlapping fields including: classical genetics, cytogenetics, molecular genetics, biochemical genetics, genomics, population genetics, developmental genetics, clinical genetics, and genetic counseling.

  9. Virtual karyotype - Wikipedia

    en.wikipedia.org/wiki/Virtual_karyotype

    A karyotype (Fig 1) is the characteristic chromosome complement of a eukaryote species. [3] [4] A karyotype is typically presented as an image of the chromosomes from a single cell arranged from largest (chromosome 1) to smallest (chromosome 22), with the sex chromosomes (X and Y) shown last.

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