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Which chromosomal defect is caused when part of a chromosome breaks off and reattaches backward on the same chromosome?
A
inversionB
translocationC
deletionD
insertion22
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DNA is a nucleic acid polymer composed of which repeating structural unit?
A
nucleotidesB
phosphate groupsC
ribosomesD
proteins23
What is the role of RNA polymerase?
A
It creates the DNA strand.B
It bonds the DNA strand.C
It helps transcribe the DNA strand.D
It translates the DNA strand.24
A mutagen is
A
a living thing that has undergone a mutation.B
an agent that causes a mutation in DNA.C
a mutation that has affected one gene.D
any chemical that can poison living cells.25
Chromosomal mutations can have a variety of effects on individuals. Klinefelter syndrome is a genetic disorder that occurs when a male has an extra copy of the X chromosome. Males who have this disorder exhibit characteristics such as producing little or no facial hair, having a less muscular body than other males, and sterility.Karyotype of Klinefelter syndromeWhich type of chromosomal mutation causes Klinefelter syndrome?
A
nondisjunctionB
translocationC
deletionD
insertionDid you find these answers helpful?
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