True microcephaly can be caused by:
A)autosomal gene alterations.
B)infection.
C)X-linked gene alterations.
D)Toxic-induced chromosomal defects.
E)maternal anorexia.

Question

Quizplus · Accepted Answer

True (primary) microcephaly (present at birth) can be caused by genetic alterations, including autosomal dominant, autosomal recessive, or X-linked genes, or various chromosomal abnormalities. 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 (develops 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