It has been found that the tenderness of beef can be predicted by analyzing a cow's genes. so, commercial tests are now available for farmers to be able to determine which of their cows possess the "tough" gene and which possess the "tender" gene. if a farmer routinely tests his cattle and only allows cows with the "tender" gene to mate, what is he doing?

Selective breeding

Explanation:

On study island the 4 choices are:

A. selective breeding

 B. forensic testing

 C. recombinant DNA technology

 D. genetic bias

A is the correct answer because the farmer is "selecting" the type of cattle he wants and making more of that type of cattle.

well we can't tell you because we cant see the time give a screen shot or something.

the answer to your question is:

c. complementary base-pairing