Gene therapy ____.
A. has not yet been used successfully with mammals
B. is a surgical technique that replaces defective genes with normal genes
C. has been used successfully to treat victims of autosomal dominant disorders by replacing the dominant allele with a recessive allele
D. is a genetic engineering technique that replaces defective alleles with normal ones
E. is only possible in adults
Answer: D
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Reproduction in prokaryotes occurs primarily through the process known as
(a) mitosis. (b) cytokinesis. (c) furrowing. (d) fission.
Who developed the modern endosymbiotic theory?
a. Charles Darwin b. Lynn Margulis c. Richard Dickerson d. Wendy Johnson e. Stanley Miller
The function of a vector in genetic engineering is to
A. separate fragments of DNA by their length and electrical charges. B. cut DNA into many fragments. C. link together newly joined fragments of DNA. D. introduce rDNA into a host cell. E. make millions of copies of a specific segment of DNA.
An individual is heterozygous for a gene at a specific locus. Sister chromatids will have _______ (the same form/different form) of alleles at that locus after S phase
Fill in the blank(s) with correct word