In E. coli the typical mRNA half-life is about 3 minutes, but half-lives of individual mRNAs may be as short as 20 seconds or as long as 90 minutes.  In budding yeast, mRNA half-lives range from 3 to 100 minutes, whereas in metazoans, half-lives range from minutes to hours, and in rare cases, even days.

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#Unit 8. Inheritance Biology

Recombination is also reduced within a pericentric inversion. No dicentric bridges or acentric fragments are produced.

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#Unit 8. Inheritance Biology

HUMAN TRISOMIES

Trisomy 18 - Edward syndrome

Trisomy 13 - Patau syndrome. 

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#Unit 13. Methods in Biology

Nested PCR follows the 'drop in drop out' PCR phenomenon.

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#Unit 13. Methods in Biology

The level of significance is denoted by the Greek symbol α (alpha).

Therefore, the level of significance is defined as follows: 

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#Unit 2. Cellular Organization

Exon sequences are conserved by the negative selection of individuals in which the sequences have changed