The introduction of normal genes into an afflicted individual for therapeutic use is called
A. human cloning.
B. proteomics.
C. genetic profiling.
D. gene therapy.
Answer: D
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During meiosis in an organism where 2n = 8, how many chromatids will be present in a cell at the beginning of meiosis II?
a. 2 b. 4 c. 6 d. 8 e. 12
Olfactory receptors are used for:
a. sight b. sound c. smell d. taste e. touch
The essence of meiosis is that
a. gametes receive one copy of each member of each pair of homologous chromosomes. b. diploid gametes are formed. c. each gamete receives one member of each pair of homologous chromosomes. d. haploid gametes are formed. e. each gamete receives one member of each pair of homologous chromosomes, and haploid gametes are formed.
Which invertebrate animal group is characterized by having a closed circulatory system?
A) Echinodermata B) Annelida C) Platyhelminthes D) Nematoda E) Arthropoda