Name two methods used in genetic prenatal diagnostic testing in humans
What will be an ideal response?
amniocentesis and chorionic villus sampling (CVS)
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In some amphibians, including salamanders, paedomorphosis results from mutations that ____
a. reduce thyroid hormone production only b. reduce pituitary hormone production only c. limit the responsiveness of some developmental processes to thyroid hormone concentration only d. reduce pituitary hormone production, limit the responsiveness of some developmental processes to pituitary hormone concentration, or both e. reduce thyroid hormone production, limit the responsiveness of some developmental processes to thyroid hormone concentration, or both
In eukaryotic cells, which occurs during the prophase of mitosis?
a. duplication of chromatids b. replication of DNA c. separation of sister chromatids d. breakup of the nuclear envelope e. appearance of the nuclear envelope
An unprotected area of naturally occurring plant and animal assemblages that is surrounded by unsuitable territory due
to development or habitat destruction is referred to by biologists as: a. an island. b. ex situ conservation. c. a reserve. d. a park. e. a refuge.
One gene can have multiple effects on an organism.
A. True B. False