Inheritance:
Human Patterns & Dilemmas

Vocab
"There are a thousand hacking at the branches of evil to one who is striking at the root, . . ."

--Henry David Thoreau Walden

codominance when both alleles are expressed.

Down syndrome the defective results of inheriting an extra chromosome 21 (trisomy 21).

inherited potential the genetic potential for development given healthy environmental conditions.

Klinefelter's syndrome the resulting defects of inheriting an extra X chromosome due to nondisjunction.

nondisjunction when sister chromatids fail to separate properly during cell division, resulting in abnormalinheritance.

Rh factor any of a group of antigens present on the surface of red blood cells, either Rh+ or Rh-(less common). Transfused or fetal Rh+ blood may induce a severe reaction in an Rh- individual.

Turner's syndrome an abnormal congenital condition resulting from a defect on or the absence of the second sex chromosome.

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