Where were the original CRISPRs found?

E. coli genome

Explanation:

CRISPR: An Adaptive Immune System

CRISPR (Clustered Regularly Interspaced Short Palindromic Repeat) sequences were initially discovered in the E. coli genome in 1987, but their function as a safeguard against bacteriophages was not elucidated until 2007.

They were originally found in the Escherichia coli genome

Explanation:

The crucial sprinkle of their reality came in 1987, when an odd inauspicious DNA gathering, which in this way was portrayed as a CRISPR, was found in the Escherichia coli genome during an assessment of qualities related with phosphate absorption.

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1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation: