Question

A normal chromosome has the gene sequence A B C D E F G ⋅ H I. Which of the following represents a tandem duplication?

A) A B C D E F G ⋅ H I
B) A B C D E F G ⋅ H I H I
C) A B C D E F G ⋅ H I G F E D C B A
D) A B C D E F G ⋅ H I D E F G

Answer 1

A tandem duplication occurs when a segment of DNA is repeated in the same order on a chromosome.

Step-by-step explanation:

A tandem duplication occurs when a segment of DNA is repeated in the same order on a chromosome. In this case, the gene sequence is A B C D E F G ⋅ H I. The option that represents a tandem duplication is A B C D E F G ⋅ H I H I. This sequence has the segment H I repeated next to the original segment.