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Question:

The mechanism that causes a gene to move from one linkage group to another is called Inversion, Translocation, Duplication, or Crossing-over?

Crossing-over

Inversion

Duplication

Translocation

Solution:

Linkage group refers to the number and type of chromosomes present in a species. Humans have 22 autosomal linkage groups, one X, and one Y linkage group. Rearrangement of a chromosomal segment between two non-homologous chromosomes, i.e., translocation, moves a gene from one linkage group to another. This occurs due to an induced abnormality and is not part of the regular cell cycle. Inversion and duplication cause rearrangements of genes on the same chromosome. There is a change in the order of genes within the same linkage group. Crossing over results in the exchange of genes between two homologous chromosomes. This is a process that occurs during Meiosis I, resulting in recombination. Therefore, the correct answer is option D (Translocation).