U11 base pairs with the 5’ splice sites; U12 base pairs with the branch point sequence near the 3’ splice site; and U4atac and U6atac provide analogous functions during the spliceosome assembly and activation of the spliceosome. 

U5 is same component in all splicing complexes

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#Unit 11. Evolution and Behavior

Evolution by natural selection occurs if variation must lead by Ecotypes. 

Ecophene is not be selected by natural selection

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#Unit 11. Evolution and Behavior

Change in environmental condition is not necessary for natural selection.

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#Unit 11. Evolution and Behavior

Genetic drift 

Genetic drift is an evolutionary force, in which allelic frequency change over generation Just by chance (sampling error). 

The deviations from the expected ratios are random, the direction of change is unpredictable.

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#Unit 11. Evolution and Behavior

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#Unit 11. Evolution and Behavior

CAUSES OF GENETIC DRIFT

Genetic drift in a small population over multiple generations can significantly affect the composition of a population’s gene pool. 

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#Unit 11. Evolution and Behavior

Founder effect

A few individuals form a population start a new population with a different allele frequency than the original population.

Sampling error can arise is through the founder effect, which results from the establishment of a population by a small number of individuals.