How many copies of the first chromosomes does a human haploid cd contains

How do diseases caused by bacteria and diseases caused by viruses react to antibiotics?

One gene can influence trait(s). one trait can be determined by gene(s).

Plz fast biotechnology is a growing field of applied biology. many crops such as corn have been engineered to be resistant to herbicides. therefore farmers can spray these chemicals to kill weeds growing near the crop without worries of killing the crop itself how does this type of biotechnology work? a. by changing the genetic make up of the crops. b. by causing the crops to kill the weeds. c. by changing the type of crops used. d. by changing the location of the crops.