chromosome refers to a sex chromosome found in both females and males. Normal females usually have two (2) X chromosomes . Normal males usually have one X along with a Y chromosome. The complete chromosome complement consisting of 46 chromosomes is conventionally written as 46,XX for females and 46,XY for males.
recessive trait refers to an attribute determined by recessive gene that appears only on X chromosomes ; because the gene determining these characteristics is recessive (that is, dominated by other genes that might appear at the same location on X chromosomes), such characteristics are more common among males; who have only one X chromosome . X-linked recessive trait is also called Sex-linked trait
brain, is that there is little differentiation between the brain structures and the cerebrospinal fluid, making the clinical use of this procedure ineffective.
beliefs are suspect, even his own.