Question

The author includes examples of broiler chickens whose legs can't support their bodies and dairy cows that burn out quickly. How do these examples support the author's statement that "selective breeding comes with both benefits and drawbacks"?

Answer 1

The Broiler

Explanation: Since the broiler chicken is short-lived, and most development of the gut immune system occurs shortly after hatching, much avian immunology research that is commercially relevant attempts to understand a system in a state of flux.