Multigene families include two or more nearly identical genes or genes sharing nearly identical sequences.A classical example is the set of genes for globin molecules,including genes on human chromosomes 11 and 16.How might identical and obviously duplicated gene sequences have gotten from one chromosome to another?
A)by normal meiotic recombination
B)by normal mitotic recombination between sister chromatids
C)by transcription followed by recombination
D)by chromosomal translocation

Question

Quizplus · Accepted Answer

The occurrence of identical or nearly identical genes on different chromosomes is often the result of chromosomal translocations, where segments of chromosomes break off and attach to a different chromosome. In the case of the globin genes, it is believed that a translocation event led to the duplication of the globin gene cluster on two different chromosomes. Meiotic and mitotic recombination can also lead to gene duplication events, but they are less likely to produce identical copies of a gene on different chromosomes. Transcription followed by recombination can also create new gene sequences, but it is less likely to result in identical or nearly identical copies of a gene on different chromosomes.

Multigene Families Include Two or More Nearly Identical Genes or Genes