Which factor have the greatest influence on creating genetic variation within a species?

The process by which natural forces move weathered rock and soil brim one place to another is called

How does the study of genetic disorders such as pku biologists understand normal alleles?

Plz genetic engineering can be applied to many fields including medicine and agriculture. which of the following is a medical application of genetic engineering? a. giving crop plants recombinant dna so that they would be resistant to herbicides. b. examining a persons pedigree to determine whether they can carry a gene for a genetic disease. c. analyzing a persons dna to see how closely they are related to another person. d. certain genes into bacteria so that they will produce a needed medicine.