Which of the following can occur that mainly involves the abnormal development of one or more structures from ectoderm within the embryonic period?

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One syndrome that can occur within this period is ectodermal dysplasia,which involves the abnormal development of one or more structures from ectoderm.It has a hereditary etiology and presents with abnormalities of the teeth,skin,hair,nails,eyes,facial structure,and glands,because these are derived from ectoderm or associated tissue.If there is failure of migration of the neural crest cells to the facial region,Treacher Collins syndrome develops in the embryo.An infective teratogen causes syphilis,Treponema pallidum,because it produces defects in the incisors (Hutchinson incisor) and molars (mulberry molar),as well as blindness,deafness,and possible paralysis if not treated.Fetal alcohol syndrome is an example of the result of a teratogenic drug effect of high levels of ethanol ingested by a pregnant female during the embryonic period.

Which of the Following Can Occur That Mainly Involves the Abnormal