Gene amplification occurs when a gene or genomic region is present in extra copies. Learn about its causes, mechanisms, effects on gene dosage and expression, cancer genetics, genomic variation, and detection.
Epigenetic mutations and changes alter gene regulation without necessarily changing the DNA sequence. Learn about DNA methylation, histone modifications, chromatin remodeling, gene expression, disease, cancer, and epigenetic testing.
Mosaicism occurs when an individual has two or more genetically different populations of cells. Learn about its types, causes, genetic mutations, chromosomal abnormalities, inheritance, diagnosis, and effects on health.
Mitochondrial mutations are genetic changes affecting mtDNA or nuclear genes required for mitochondrial function. Learn about their types, causes, heteroplasmy, inheritance, disorders, testing, and therapeutic research.
Chromosomal abnormalities are changes in chromosome number or structure that can affect genes, development, reproduction, and disease. Learn about their types, causes, effects, diagnosis, and genetic testing.
Repeat expansions are genetic mutations in which repeated DNA sequences increase in length. Learn about their types, causes, genetic instability, anticipation, associated disorders, diagnosis, and molecular effects.
Copy number variations (CNVs) are genomic changes involving gains or losses of DNA segments. Learn about their types, causes, effects on gene dosage, genetic disorders, cancer, detection, and role in human genetics.
Structural variants are large-scale changes in DNA organization, including deletions, duplications, inversions, and translocations. Learn their causes, effects, detection, genetic disorders, and role in cancer.
Regulatory mutations alter DNA regions that control gene expression. Learn about promoter, enhancer, silencer, and other regulatory mutations and their effects on genes, development, genetic disorders, and cancer.
Insertions and deletions, or indels, are genetic changes involving added or removed DNA nucleotides. Learn how they cause frameshift and in-frame mutations and affect genes, proteins, genetic disorders, and cancer.
Frameshift mutations occur when insertions or deletions shift the DNA reading frame. Learn about their causes, molecular effects, genetic disorders, cancer, and detection.
Nonsense mutations introduce premature stop codons into protein-coding genes. Learn how they affect protein production, nonsense-mediated mRNA decay, genetic disorders, cancer, inheritance, and genetic testing.
Missense mutations are DNA changes that replace one amino acid with another in a protein. Learn about their types, causes, molecular effects, inheritance, and role in genetic disorders, cancer, and human genetics.
Silent mutations are DNA changes that do not alter the encoded amino acid. Learn how synonymous mutations occur and how they can influence RNA splicing, mRNA stability, translation, protein folding, genetic variation, and disease.
Genetic mutations are changes in DNA that can influence genes, proteins, cells, and human health. Learn about different types of mutations, their causes, effects, inheritance, and role in genetic disorders and cancer.
