To discuss:
How heredity and health are affected not only by genetic changes but also by epigenetic changes.
Introduction:
Heredity is passed from one generation to the next through both genetic and non-genetic (epigenetic) inheritance. There are several mechanisms that alter the expression of a gene apart from a mutation. Alternation of a gene expression without changing the DNA bases is known as epigenetic modifications such as DNA methylation, histone modification, and miRNA expression. DNA methylation (addition of a methyl group to cytosine bases of DNA sequence) inhibits gene expression, which is a normal biological process involved in human development. All the genes are not active in every cell; only few genes are active and others are inhibited by DNA methylation and other mechanisms based on the cell types (example, embryonic cells).
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Anatomy & Physiology: The Unity of Form and Function
- Identify the term that best matches the definition or description given. a trait found on the X or Y chromosome genes that are on the same chromosome 1. polygenic trait when there is a survival 2. sex-linked trait benefit to individuals with two different alleles 3. incomplete dominance Both alleles are equally expressed. 4. heterozygous advantage Neither allele completely 5. codominance conceals the other. 6. linked genes a trait controlled by many genes 7. continuous variation a range in gene expression 10000arrow_forwardThe genetic code:arrow_forwardBriefly explain why each of the following statements is false, or reword it to make it true8. All mutations result in the production of defective proteins and are therefore harmful.arrow_forward
- Human Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage Learning