Approximately _____ of the gametes produced by an individual heterozygous for a translocation will be nonviable.
A. an eighth
B. all
C. a quarter
D. none
E. half
Ans: E. half
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The Simpson's diversity index value is higher when the number of species in a system is lower
Answer the following statement(s) true (T) or false (F)
The trp operon in E. coli is regulated in such a manner as to allow expression of the genes only when cellular levels of tryptophan are low. When tryptophan levels are adequate, the secondary structure of the mRNA halts translation. This form of regulation is known as
A) attenuation. B) transcriptional regulation. C) positive regulatory control. D) negative regulatory control. E) repression.
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
What will be an ideal response?
Traditionally, classification of fungi has been based on
a. DNA sequences. b. body type. c. mode of feeding. d. whether the fungus is a saprobe, parasite, or in a mutual symbiosis. e. structures that release sexual spores.