Frederick Griffith discovered
A) transformation.
B) transposons.
C) the lac operon.
D) DNA.
E) conjugation.
A
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A dihybrid testcross is made between genes H and I. Four categories of offspring are produced: H I, H i, h I, and h i. How many degrees of freedom would there be in a chi-square test for goodness of fit of the null hypothesis that the H and I genes are unlinked?
A) 1 B) 2 C) 3 D) 4 E) 0
Filamentous microbial mats in anoxic, sulfide-rich cave springs are dominated by members of the ________.
A. alpha proteobacteria B. delta proteobacteria C. epsilon proteobacteria D. beta proteobacteria
The highly repetitive minisatellite DNA regions of the genome are highly polymorphic in the number of copies of the individual repeats among different individuals
They are often used for "fingerprinting" individuals for forensic analysis. Describe how the process of unequal crossing over alters the copy number of these repeats. What will be an ideal response?
The net distance a molecule travels through the cytosol via diffusion is relatively short in comparison with the total distance it may need to travel
This is because movement governed by diffusion alone is a ________________ process that is most effective for the dispersion of small molecules over short distances. (a) slow (b) random (c) regulated (d) complicated