Aregional, social, or ethnic variation of a language is known as a(n)

Dialect

A dialect is defined as the social, ethnic or a regional variation in a language that is different from the standard use in terms of idiom, pronunciation and in vocabulary.

It is most often applied to local or regional speech patterns. A dialect which is associated with the particular ethnic group is called as ethnolect and the regional is termed as regiolect.

answer; a male inherits only one allele of the x-linked gene controlling hair color;

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation: