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A nuclear membrane is a double membrane that encloses the cell nucleus.
… Nuclear Membrane, Chromosome, Cell Biology …
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Hemophilia is an inherited disease, most commonly affecting males, that is characterized by a deficiency in blood clotting.
… Hemophilia, Blood Clotting, X Chromosome, Gene, Mutation … blood clotting. The responsible gene is located on the X chromosome, and since males inherit only one copy of the X chromosome, if that chromosome carries the mutated gene then …
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Deletion is a type of mutation involving the loss of genetic material.
… Genetic Mutation, Base Pair, DNA, Chromosome … from a single nucleotide to an entire piece of a chromosome. …
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A copy number variation (CNV) is when the number of copies of a particular gene varies from one individual to the next.
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A somatic cell is any cell of the body except sperm and egg cells.
… Cell, Chromosome, Diploid, Mutation, Germ Line …
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Cytogenetics is the branch of genetics that studies the structure of DNA within the cell nucleus.
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Homologous recombination is a type of genetic recombination that occurs during meiosis (the formation of egg and sperm cells).
… DNA sequences can cross over, or be exchanged, from one chromosome to the other. This exchanging of DNA is an …
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Homozygous is a genetic condition where an individual inherits the same alleles for a particular gene from both parents.
For Patients and Families
A list of genetic, orphan and rare diseases under investigation by researchers at or associated with the National Human Genome Research Institute.
Educational Resources
A nucleosome is the basic repeating unit of eukaryotic chromatin.
… Nucleus, Chromatin, Chromosome, Deoxyribonucleic Acid (DNA), Histone, Protein … wrapped around a core of histone proteins. In forming a chromosome, the nucleosomes repeatedly fold in on themselves …