Maintained by the National Science Teachers Association

In chorionic villi (KAWR-ee-AHN-ik VIL-ie) sampling, also shown in Figure 12-14, the physician takes a sample of the chorionic villi— cells derived from the zygote that grow between the mother's uterus and the placenta—between the 8th and 10th week. Both procedures allow technicians to analyze fetal cells, chromosomes, proteins and detect genetic disease.

Table 12-1 lists some important genetic disorders, symptoms, and their patterns of inheritance.

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