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Heredity, also called inheritance or biological inheritance, is the passing on of traits from parents to their offspring; either through asexual reproduction or sexual reproduction, the offspring cells or organisms acquire the genetic information of their parents.
DNA contains the genetic information that allows all forms of life to function, grow and reproduce. However, it is unclear how long in the 4-billion-year history of life DNA has performed this function, as it has been proposed that the earliest forms of life may have used RNA as their genetic material.
This is an accepted version of this page This is the latest accepted revision, reviewed on 28 January 2025. Science of genes, heredity, and variation in living organisms This article is about the general scientific term. For the scientific journal, see Genetics (journal). For a more accessible and less technical introduction to this topic, see Introduction to genetics. For the Meghan Trainor ...
The hereditary material, the germ plasm, is transmitted only by the gonads. Somatic cells (of the body) develop afresh in each generation from the germ plasm. August Weismann proposed the germ plasm theory in the 19th century, before the foundation of modern genetics .
Genetic disorders are diseases that are caused by a single allele of a gene and are inherited in families. These include Huntington's disease , cystic fibrosis or Duchenne muscular dystrophy . Cystic fibrosis, for example, is caused by mutations in a single gene called CFTR and is inherited as a recessive trait.
Also, eukaryotic cells seem to have experienced a transfer of some genetic material from their chloroplast and mitochondrial genomes to their nuclear chromosomes. Recent empirical data suggest an important role of viruses and sub-viral RNA-networks to represent a main driving role to generate genetic novelty and natural genome editing.
What is the meaning behind the end of Hereditary? While Hereditary uses the horror genre to exaggerate ideas and entertain, its foundational theme is trauma, according to Aster.
The duplication and transmission of genetic material from one generation of cells to the next is the basis for molecular inheritance and the link between the classical and molecular pictures of genes.