A model organism is a species that has been widely studied to understand a particular biological phenomena, normally used because they are easy to breed and maintain in a laboratory setting and has certain experimental advantage.
The criteria that Thomas hunt Morgan was looking for include; the model organism should be small in size, easy to keep in the laboratory and also able to produce large number of off springs in a short time.
No caffein,there is a factor that must not be changed when conducting an experiment,known as controlled variable
The answer is Sex-Linked Traits
Answer:
Explanation: osteoporosis occurs when there is an imbalance between bone formation and bone resorption.
