It is possible to calculate the number of clones that must be present in a gene library to give a probability of obtaining a particular DNA sequence. This formula is:

 

where N is the number of recombinants, P is the probability and f is the fraction of the genome in one insert. Thus for the E. coli DNA chromosome of 5 × 10 ⁶ bp andan insert size of 20 kb ( f = 0.004), the number of clones needed ( N ) would be 1 × 10 ³ ,with a probability of P will be

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#Question id: 8895

#Unit 9. Diversity of Life Forms

What is one characteristic that separates chordates from all other animals?

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#Question id: 5611

#Unit 5. Developmental Biology

Which ion play an essential role in pollen tube growth?

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#Question id: 12451

#Unit 10. Ecological Principles

What type of population would be associated with a population pyramid that had an extremely broad base?

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#Question id: 1275

#Unit 4. Cell Communication and Cell Signaling

The functions of the extracellular matrix include:

a. supporting differentiation.

b. inducing morphogenesis.

c. binding growth hormones.

d. repairing damaged tissue

which of the following combination is correct?

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#Question id: 24549

#Unit 9. Diversity of Life Forms

Which character showing may be the size, shape, coloration, and many other traits similar  in diverse lineages, due to this have to moving towards the gene  level ?