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.
This is the skin, and skin derivatives; (hair, nails, glands and receptors). The Integumentary system has many functions: 1  Protects the body's internal living tissues and organs. 2  Protects against invasion by infectious organisms.3  Protects the body from dehydration. 4  Protects the body against abrupt changes in temperature.hese are not necessarily part of the Integumentary System, and are general to many of the other systems of the body. Connective tissues support and protect the body's organs, and bind organs together. They usually are highly vascular (rich blood supply) and contain fibres.