A number of genetic and chromosomal disorders exist although a preponderance of children are
born without a genetic or chromosomal disorder. In addition, many individuals may be carriers
of a genetic condition.
Present a definition for and an example of each of the following disorders:
autosomal dominant, autosomal recessive, sex-linked, trisomy, sex chromosome anomaly.
What will be an ideal response?
Autosomal dominant – a single dominant pattern trait is transmitted; usually diagnoses in adulthood;
Huntington's disease; migraine headaches.
Autosomal recessive – two recessive genes must betransmitted ; most common cause of disorders;
PKY, Tay-Sachs; Sickle-cell.
Sex-linked – recessive genetic transmission, more frequent in males ; more common transmission is
from carrier mother: Fragile x, red-green colorblindness.
Trisomies – three copies of a particular autosome; error, rather than genetic transmission; Down
syndrome.
Sex-chromosome involves extra sex linked or lack of sex linked chromosome; error is not a genetic
transmission; Klinefelter's – XXY; Turner's XO.
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A theoretical approach focusing on how children perceive, store, and retrieve information is called
A) the information-processing approach. B) ethology. C) neuropsychology. D) ecological systems theory.