Bone loss outpaces bone formation when a person suffers from ____
a. osteoporosis
b. Parkinson's disease
c. muscular dystrophy
d. Alzheimer's disease
e. bone spurs
ANSWER: a
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A) It delivers a gene to a specific part of the genome. B) It can be used in vivo. C) It is the only tool that can delivery genes safely in humans. D) It can also be used to deliver proteins.
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If an organism is an inversion heterozygote, __________
A) homologous chromosomes align during meiosis through formation of an inversion loop at synapsis B) homologous chromosomes align during meiosis through formation of a Holliday junction at synapsis C) non-homologous chromosomes pair during meiosis due to the translocation of genes between two different chromosomes D) it will experience normal chromosome synapsis during meiosis E) it will be unable to complete replication due to DNA damage, and the cell cycle will be arrested
Trisomy 21 is a consequence of _________________, the unequal distribution of chromosomes during meiosis.
a. crossing over b. cytokinesis c. chorionic villus sampling d. recombination e. non disjunction