When the offspring's phenotype is a "combination" (mixture) of parents' phenotypes A) Punnett square
B) Polygenic inheritance
C) Codominance
D) Incomplete dominance

true skin; another name for the dermis. lies directly beneath the epidermis and is often referred to as the true skin. outermost layer of epidermis, consisting of dead cells.

during expiration the diaphragm relaxes, which causes the diaphragm to move downwards. the contraction of diaphragm increases the space for expansion of lungs. hence, the diaphragm relaxes and positioned downward during expiration.