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The Consequence of Inversion

View the animation below, then complete the quiz to test your knowledge of the concept.






1Consider a normal chromosome with the following gene sequence along its length: F G H I J K L. Which of the following sequences represents an inversion?
A)F G H K L
B)H I J K L
C)F G H I J K J K L
D)J K L F G H I
E)none of the above



2An inversion is best be described as a
A)change in the DNA from an A-T base pair to a G-C basepair.
B)change from the homozygous to the heterozygous state.
C)change from the dominant to the recessive form of a gene.
D)reversal in the orientation of a segment of a chromosome.
E)reversal of the sex of an individual.



3In meiosis, a chromosome carrying an inversion
A)cannot pair with a normal homologous chromosome.
B)can only pair with a chromosome carrying the same inversion.
C)can only pair with a chromosome carrying a different inversion.
D)can pair with a normal homologous chromosome by forming an internal loop.
E)can pair with any non-homologous chromosome.



4Inversions never alter gene expression.
A)True
B)False



5An inversion results in an increase in the amount of DNA on a chromosome.
A)True
B)False







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