In the Beadle and Tatum study, it was important that Neurospora was haploid because:a
it is easier to grow haploid molds in the laboratory.
b. haploid molds have simpler nutritional requirements than do diploid molds.
c. a mutation that arises is not masked by a normal allele on a homologous chromosome.
d. haploid Neurospora will always mutate.
e. diploid Neurospora will always mutate.
c
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In a cell with a diploid number of 12, how many chromatids are present at prophase of mitosis?
A) 6 B) 12 C) 24 D) 48 E) none of the above
The whole-genome shotgun approach for collecting the data used to determine the nucleotide sequence of microbial genomes uses ________.
A. powerful computers and specialized software and automated sequencing of random fragments of genomic DNA B. adapters that are added to genomic DNA fragments C. powerful computers and specialized software D. automated sequencing of random fragments of genomic DNA
The specific linear sequence of amino acids that form a polypeptide chain is
A) quarternary structure B) tertiary structure C) secondary structure D) DNA sequence E) primary structure
A young man living in the Southeastern U.S. is an avid outdoorsman and has a history of tick bites. Blood tests show that he has leukopenia.. He may have contracted
A) brucellosis. B) tularemia. C) Lyme disease. D) ehrlichiosis. E) Chagas' disease.