Which of the following choices best describes therapeutic cloning?
1.The nucleus from a somatic cell is transferred into an enucleated egg, which divides in culture, forming an inner cell mass of embryonic stem cells.
2.A human gene is inserted into a retrovirus and transferred into a patient's white blood cells to correct a disorder.
3.Totipotent cells from early embryos are propagated in culture and transferred into patients to treat disease.
4.Germ cells of individuals with genetic disorders are targeted for gene transfer to repair the mutated gene.
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Protozoan cysts are
A. necessary for transmission to a new host. B. part of all protozoan life cycles. C. the primary form of replication. D. analogous to bacterial endospores. E. are produced by binary fission.
What technique can be used to detect genetic defects in early stage embryos, prior to implantation?
a. genetic screening b. chorionic villus sampling c. PGD d. amniocentesis e. micromanipulation
What is the process of natural selection?
What will be an ideal response?
Cell condition in which two of each type of chromosome are present.
What will be an ideal response?