Examples: The gene for seed shape in pea plants exists in two forms, one form or allele for round seed shape (R) and the other for wrinkled seed shape (r). A true-breeding round seed plant would be (RR) for that trait and a true-breeding wrinkled seed plant would be (rr).
The integumentary system consists of the skin, hair, nails, the subcutaneous tissue below the skin,and assorted glands.The most obvious function of the integumentary system is the protection that the skin gives to underlying tissues. The skin not only keeps most harmful substances out, but also prevents the loss of fluids.
The Integumentary system is the organ system that protects human body from damage. It consists of skin and its appendages, which include hair, nails, and sweat glands etc.It forms about 16 percent of the weight of human body.he Integumentary system has a variety of functions. 1  It serves as a waterproof cushion that protects deeper tissues. 2  It excretes wastes and regulates body temperature. 3  It is the attachment site for different types of sensory receptors to detect pain, sensation, pressure, and temperature.