True microcephaly can be caused by: (Select all that apply.)
A) Autosomal gene alterations
B) Prenatal physical abuse of the mother
C) X-linked gene alterations
D) Toxic-induced chromosomal defects
E) Maternal anorexia

Question

Quizplus · Accepted Answer

Genetic alterations,including autosomal dominant,autosomal recessive or X-linked genes,or various chromosomal abnormalities can cause true (primary)microcephaly (present at birth).Environmental causes include toxin exposure during the period of induction and major cell migration.Radiation,intrauterine infection,or chemical exposure may be the initiating factor.Secondary microcephaly (developing postnatally)is associated with a variety of causes including infection,trauma,metabolic disorders,maternal anorexia experienced during the third trimester of pregnancy,and the presence of other genetic syndromes.

True Microcephaly Can Be Caused By: (Select All That Apply