genetic variants and phenotypes

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7 Terms

1
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what is a genetic variant/mutation?

a change in the bases of a gene

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how can mutations occur?

when DNA is not copied properly during cell division

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what external factors can cause mutations?

environmental factors, such as radiation

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can mutations affect an organisms phenotype?

yes

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what are alleles?

different forms of a gene

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what determines an individual’s characteristics?

the alleles they inherit

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how can a mutation in the non coding region affect transcription?

it may prevent RNA polymerase from binding properly, reducing transcription

other mutations can result in the enzyme binding to the non coding region better and producing more mRNA