The color of a daisy's petals is a(n) ________, the instructions for which are found in a gene controlling petal color. There may be many alternate versions of this gene, which are called __________.
A) trait; chromosomes
B) trait; alleles
C) base pair; alleles
D) base pair; traits
E) allele; traits
B) trait; alleles
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A change in a nucleotide sequence that results in addition or deletion of a single nucleotide and largely changes the amino acid sequence of the resulting peptide is known as a
A) nonsense mutation. B) silent mutation. C) missense mutation. D) frameshift mutation. E) none of the above
The movement of water is critical to life. Discuss how the movements of water (both horizontal and vertical) affects climate and coastal productivity
What will be an ideal response?
Which of the following cells are diploid?
a. spermatids b. primary spermatocytes c. secondary spermatocytes d. spermatogonia e. both primary spermatocytes and spermatogonia
An activator protein would have which of the following effects on an operon with a positive control
mechanism? a. stimulate transcription b. turn off transcription c. stimulate transcription when a coactivator is bound to the allosteric site d. inhibit transcription when a coactivator is bound to the allosteric site e. no response