The main difference between therapeutic cloning and reproductive cloning is that
A. in therapeutic cloning, embryonic stem cells are extracted from the blastocyst, while in reproductive cloning, the blastocyst is kept intact and implanted into a surrogate mother.
B. unlike cells used for reproductive cloning, cells grown for therapeutic purposes do not display genetic imprinting problems.
C. somatic cell nuclear transfer is used for therapeutic cloning, while gametic cell nuclear transfer is used in reproductive cloning.
D. unlike cells used for reproductive cloning, cells grown for therapeutic purposes do not require the destruction of embryos.
Answer: A
You might also like to view...
You want to engineer a eukaryotic gene into bacterial colony and have it expressed. What must be included in addition to the coding exons of the gene?
A) the introns B) eukaryotic polymerases C) a bacterial promoter sequence D) eukaryotic ribosomal subunits E) eukaryotic tRNAs
The study of the crown gall tumor found
A. a bacterial plasmid promoter that was similar to plant promoters. B. an R plasmid. C. incorporation of the bacterial chromosome into the plant. D. incorporation of the plant chromosome into the bacteria.
Answer the following statements true (T) or false (F)
1. Some chytrids parasitize protists. 2. Yeast contain genes that are similar to genes associated with human disease. 3. The first aquatic vertebrates arose at approximately the same time as the plants on land. 4. Gastrulation is brought about by an invagination of the wall of the blastocoel.
Respond to statements 103–107 with reference to the five terms
below. a. somites b. blastomeres c. ectoderm d. mesoderm e. endoderm M 103. This is the first primary tissue layer to form. E 104. It forms between the other two primary tissue layers. M 105. These are the source of most bones and the skeletal muscle of the head and trunk. M 106. These reorganize themselves into the gastrula. E 107. This starts the gut’s inner lining.