Which process results in the production of offspring who are recombinant for two genes on the same chromosome?
a. movement of transposable elements
b. pairing of nonhomologous chromosomes
c. gene duplication
d. exon shuffling
e. crossing over between homologous chromosomes
ANSWER: e
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HIV typically attaches to
A. protein A. B. C3b. C. C5a. D. CD4.
Which of the following statements is true?
a. Mosses have xylem b. Mosses have lignin. c. Mosses have true stems. d. Mosses have rhizoids. e. Mosses have independent sporophytes
All EXCEPT which of the following must be
available for the light-independent reactions to occur? a. carbon dioxide b. oxygen c. ribulose bisphosphate d. ATP and NADPH e. enzymes
Which of the following transgenic techniques requires linker proteins?
A) Embryonic stem cell method B) Retrovirus-mediated method C) Pronuclear injection method D) Sperm-mediated transfer method E) Plasma cell membrane fusion method