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: 15406

#Unit 8. Inheritance Biology

Which method of gene transfer involves direct contact between the bacteria?

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#Question id: 27574

#Unit 1. Molecules and their Interaction Relevant to Biology

Misplaced Dispersion forces are responsible for

a. Sickle-Cell Anemia

b. Alzheimer's disease

c. CFTR

d. Huntington disease

Choose which of the above set of diseased caused by Misplaced Dispersion

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#Question id: 11424

#Unit 10. Ecological Principles

In robert h. Whittaker's approach to relating terrestrial biomes and climatic variables, the principal biomes fall in a triangular area that does not include climates with __________.

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#Question id: 28199

#Unit 5. Developmental Biology

when the two interacting tissues are both inducers to give a signal and are competent to respond to each other’s signals, such interactions are called as___

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#Question id: 12781

#Unit 10. Ecological Principles

Subtraction of which of the following will convert gross primary productivity into net primary productivity?