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# Human Genetics ## Impact of Variant or Mutation ### Why does a gene variant or mutation occur? #### Inherited - Passed from parent to child - Variant gene was present from birth - Phenotype not expressed if recessive gene - Individual may be a carrier #### Non-Inherited - Occurs in somatic cell...

# Human Genetics ## Impact of Variant or Mutation ### Why does a gene variant or mutation occur? #### Inherited - Passed from parent to child - Variant gene was present from birth - Phenotype not expressed if recessive gene - Individual may be a carrier #### Non-Inherited - Occurs in somatic cells (somatic variants) - Occurs at some point in an individual's life - Variants cannot be passed to child - Caused by environmental factors (e.g., X radiation in medical examination, UV from sun) - Error in DNA replication during cell division --- ### Additional Information - [Image includes a diagram illustrating anatomical derivations] - [Background features DNA sequences]