Which of the following statements about homologous genes is TRUE?
A) For protein-coding genes, homologous genes will show more similarity in their amino acid sequences than in their nucleotide sequences.
B) Fewer than 1% of human genes have homologs in the nematode and the fruit fly.
C) Most homologous genes arose by gene duplication.
D) A gene in humans that has homologs in plants and prokaryotes will show the same level of similarity in nucleotide sequence when the human and prokaryotic sequences are compared as when the human and chimpanzee sequences are compared.
Correct Answer:
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A)A
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