Which statement about duplications and translocations is true?
A) Translocations involve the loss of a chromosomal segment,whereas duplications involve the addition of an entire chromosome.
B) Duplications involve the breaking and swapping of DNA segments on homologous chromosomes,whereas translocations are reciprocal exchanges on nonhomologous chromosomes.
C) Translocations involve the breaking and insertion of DNA segments in reverse order,whereas duplications are the breaking of DNA at different points on the chromosome.
D) Duplications lead to duplications of the chromosome,whereas translocations involve the swapping of chromosome segments.
E) Translocations result in loss of chromosomal segments,whereas duplications result in significant additions to nonhomologous chromosomes.

Question

Quizplus · Accepted Answer

Duplications involve the addition of extra copies of a chromosomal segment, whereas translocations involve the exchange of chromosomal segments between nonhomologous chromosomes. Reciprocal translocations involve the exchange of chromosomal segments between nonhomologous chromosomes without a loss of genetic material. Therefore, option B, which describes the swapping of DNA segments on homologous chromosomes for duplications and reciprocal exchanges on nonhomologous chromosomes for translocations, is the correct statement.

Which Statement About Duplications and Translocations Is True