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Down Syndrome is a genetic, developmental condition caused by nondisjunction of chromosome 21 during meiosis. Explain how a problem with the spindle checkpoint can cause this to occur in the cell.

If a short sequence of DNA is 5′ AATTGCCGT 3′, its complement is

After a certain distance apart on the chromosome, linkage can no longer be distinguished from random chance. What is the distance?

What term describes the process in which external DNA is taken up by a cell, thereby changing morphology and physiology?

What term describes the process in which external DNA is taken up by a cell, thereby changing morphology and physiology?

After a certain distance apart on the chromosome, linkage can no longer be distinguished from random chance. What is the distance?

Suppose a new species of bacterium is discovered.  It contains a form of DNA pol III that can add new nucleotides to either the 5′ end or the 3′ end of an existing strand.  All other properties of the enzyme remain unchanged.  How would DNA replication in these bacteria differ from normal replication?

Which is not a component of nucleic acids?

A somatic cell from a corn plant normally contains 20 chromosomes.  How many sister chromatids would that cell contain during G2 of the cell cycle?

This stage of mitosis is characterized by the disassembly of spindle apparatus, the reestablishment of the nuclear membrane, and the decondensation of the chromosomes: