If pseudogenes are nonfunctional, why are they retained in the genome?
What will be an ideal response?
Ans: The generation and elimination of pseudogenes is an ongoing evolutionary process. If the presence of the pseudogene has no phenotypic effect, then its retention or elimination is more due to random processes such as genetic drift. Many former pseudogenes, however, take on new functions because of the transcripts they produce or because of new expression patterns resulting from their positions in relation to regulatory regions.
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_____ genetic mutations. _____ sexual reproduction. _____ bacterial conjugation. _____ gene duplication. _____ interspecies exchange of genes.
A(n) __________ consists of hardened parts at the body surface. Fill in the blank(s) with the appropriate word(s)
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Which of the following synthesizes RNA molecules in the nucleus?
A) Ribosomal RNA B) DNA C) RNA polymerase D) Transfer RNA E) Messenger RNA