Describe how amniocentesis is used in the prenatal diagnosis of human genetic abnormalities. Then
compare and contrast the benefits and risks associated with amniocentesis and chorionic villus
sampling. What will be an ideal response?
Concepts to Consider: Amniocentesis involves collecting a sample of fetal cells from the amniotic
fluid that surrounds the fetus. The karyotype of these cells can then be examined for chromosomal
defects. Chorionic villus sampling can be used effectively earlier in pregnancy than amniocentesis;
however, it is associated with a slightly greater risk of miscarriage. Also, since the conditions
diagnosed using these procedures are incurable, there may be both psychological and physical benefits
to having the information available earlier in the pregnancy if abortion is going to be considered
You might also like to view...
Cyanobacteria, milkweed plants, and oak trees are all considered:
A. primary producers. B. primary consumers. C. secondary consumers. D. tertiary consumers. E. decomposers.
Where do antigen-presenting cells interact with
T cells?
a. the thymus b. the pituitary gland c. the lymph nodes d. the adrenal glands e. the red bone marrow
Figure 24.4
In the accompanying figure, a(n) ____ has body plan B, which features a __________.
A. roundworm; pseudocoelom B. roundworm; coelom C. tapeworm; no body cavity D. annelid; coelom E. earthworm; pseudocoelom
What is the life history adaptation called where organisms produce offspring several times over many seasons?
A. polyparity B. biparity C. alloparity D. iteroparity E. semelparity