Pharmaceutical companies sell some of their products to hospitals and clinics directly. They also market other products to large retail chains like Walgreens that distribute them to their stores across the nation. In addition, they sell products to drug wholesalers that sell to the remaining independent drugstores in the U. S. What method of distribution best describes the method used by pharmaceutical companies in this example?

Dual distribution

Explanation:

Dual distribution is a method of distribution or arrangement, whereby a company uses majorly two approaches simultaneously in distributing their products to their end-users. The company or manufacturer of the product sells their products directly to the end-users and also sells their product to companies that act as marketing intermediaries that later resell their products to the end-users.

According to the information given in the question above, we can infer that the method of distribution used by pharmaceutical companies is an example of dual distribution.

format change of dna.  

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

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