Question
In: Biology
In comparing Drosophila and human genomes, which of the following statements is correct? A The amount...
In comparing Drosophila and human genomes, which of the following statements is correct?
A The amount to total DNA in genome is similar.
B The number of identified protein motifs is similar.
C The average size of introns is similar.
DThe amount of non-coding DNA is similar.
E The number of introns per gene is similar.
Solutions
Expert Solution
In comparing Drosophila and human genomes, which of the following statements is correct?
Answer - B The number of identified protein motifs is similar.
Explanation: The motifs identified in Drosophila and human genomes are similar in number although there are differences in architechture and positioning of the motifs.
Explanation as to why the other four options (A, C, D and E) are incorrect:
The genome sizes of humans and Drosophila (melanogaster) are different. The human genome has about 25,000 protein coding genes whereas the Drosphila has about 13,000 protein coding genes. And the amount of non-coding DNA in the human genome is much more than the amount of non-coding DNA in the genome of Drosophila.
The average size of introns are not similar in human and Drosophila genomes as they size and distribution of introns depend on the untranslated regions (UTRs) and protein coding sequences (CDSs) and the differences between these two.
Also, human genome has more introns per gene than the Drosophila genome because as a higher and more evolved organism, human beings need a greater diversity in proteins and introns help generate different proteins.
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