In the following figure, a double crossing-over event occurs between the Alu elements. How does this event describe a means by which introns generate genetic diversity?
What will be an ideal response?
ANS:
This figure depicts how crossing-over at introns can lead to exon shuffling. Exon shuffling can produce novel proteins.
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A clamp connection is
A. a ring of hyphae produced by some fungi that is used to snare nematodes. B. a bypass formed during cell division in basidiomycetes that aids distribution on nuclei. C. the connection of a basidiospore to the basidium. D. the sticky substance that holds shelf fungi onto trees. E. the hyphae that hold crustose lichens onto rocks.
Closely related plant species that attract different pollinators resulting in reproductive isolation is an example of
A. sympatric speciation. B. allopatric speciation. C. hybrid inviability. D. hybrid infertility. E. hybrid breakdown.
A nucleotide consists of
A.) a sugar, a protein, and adenine. B.) a sugar, an amino acid, and starch. C.) a sugar, a phosphate group, and a nitrogen base. D.) a starch, a phosphate group, and a nitrogen base.
What does the rolling circle model of replication refer to?
a. transfer of plasmid DNA from one cell to another b. transfer of genomic DNA from one cell to another c. all bacterial DNA replication d. the multiple replication bubbles seen in prokaryotes