Fafa (fafagh72)

In biology, a mutation is an alteration in the nucleic acid sequence of the genome of an organism, virus, or extrachromosomal DNA.

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Circadian rhythms have been widely observed in animals, plants, fungi and cyanobacteria and there is evidence that they evolved independently in each of these kingdoms of life.

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Circadian rhythms are regulated by a circadian clock whose primary function is to rhythmically co-ordinate biological processes so they occur at the correct time to maximise the fitness of an individual.

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Genetics is a branch of biological sciences that studies and analyzes the genetic characteristics of people. This science is a study that examines the role of genes in the transmission and selection of people's characteristics and traits.

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Human genetic diversity is the genetic differences among populations. There may be several variants (alleles) of any given gene in the human population, this condition is called polymorphism.

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No two people are genetically identical. Even monozygotic twins (bred from the same zygote) have little genetic difference due to mutations that occur during development and changes in gene copy number.

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Structurally, DNA is a very long double-stranded chemical polymer that forms a double helix and is intertwined like a delicate spiral staircase.

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