Biology 11th Edition by Cecie Starr ,Ralph Taggart

تمرين 14

Rama the cama , a llama-camel hybrid, was born in 1997. Camels and llamas have a shared ancestor but have been separated for 30 million years. Veterinarians collected semen from a male camel that weighed close to 1,000 pounds, then used it to artificially inseminate a female llama one-sixth his weight. The idea was to breed an animal having a camels strength and endurance and a llamas gentle disposition.
Instead of being large, strong, and sweet, Rama is smaller than expected and has a camels short temper. Rama resembles both parents, with a camels long tail and short ears but no hump, and llama-like hooves rather than camel footpads. Now old enough to mate, he is too short to get together with a female camel and too heavy to mount a female llama. He has his eye on Kamilah, a female cama born in early 2002, but will have to wait several years for her to mature. The question is, will any offspring from such a match be fertile
What does Ramas story tell you about the genetic changes required for irreversible reproductive isolation in nature Explain why a biologist might not view Rama as evidence that llamas and camels are the same species.