Options for Selecting Dairy Cattle for Milk Coagulation Ability

We already saw in Chapter 7 that all of these statements also apply to plant domestication. The ways in which domesticated animals have diverged from their wild ancestors include the following. Many species changed in size: cows, pigs, and sheep became smaller under domestication, while guinea pigs became larger. Sheep and alpacas were selected for retention of wool and reduction or loss of hair, while cows have been selected for high milk yields. Several species of domestic animals have smaller brains and less developed sense organs than their wild ancestors, because they no longer need the igger brains and more developed sense organs on which their ancestors depended to escape from wild predators. o appreciate the changes that developed under domestication, just I 6 O • GUNS, GERMS,and steel table 9.1 The Ancient Fourteen Species of Big Herbivorous Domestic Mammals The Major Five 1. Sheep. Wild ancestor: the Asiatic mouflon sheep of West and Central Asia. Now worldwide. 2. Goat ...»