How would one explain a testcross involving F1 dihybrid flies in which more parental-type offspring than recombinant-type offspring are produced?
A) The two genes are closely linked on the same chromosome.
B) The two genes are linked but on different chromosomes.
C) Recombination did not occur in the cell during meiosis.
D) Both of the characters are controlled by more than one gene.
A
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Using the drawing of mRNA below, choose the letter that best fits the description. The special structure formed at this region is required for initiation of translation. ____
What will be an ideal response?
In eukaryotic cells, if you compared the DNA sequence of a gene with the sequence of the processed mRNA that was transcribed from the gene you would find
A. both are the same length. B. the mRNA is shorter because it does not contain introns. C. the mRNA is longer because each codon of one amino acid encodes three bases. D. the mRNA is shorter because each codon of three bases encodes only one amino acid. E. the mRNA is shorter because it does not contain exons.
Sprains
What will be an ideal response?
What is the process through which flowers evolved to attract pollinators that, in turn, became adapted to certain types of flowers?
A. coevolution B. artificial selection C. narrowing niche breadth D. nutrient cycling