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Juli2301 [7.4K]
3 years ago
15

Multigene families include two or more nearly identical genes with related functions. A classical example is the set of genes fo

r globin molecules, including genes on human chromosomes 11 and 16. Some of these genes produce hemoglobin only in the fetus or embryo. Others are very similar to functional genes, but have accumulated mutations and are no longer functional. A scheme of alpha globin gene family and beta globin gene family. The alpha globin gene cluster is located on chromosome 16 and includes the loci zeta, pseudozeta, pseudoalpha-2, pseudoalpha-1, alpha-2, alpha-1, pseudotheta. The zeta gene produces hemoglobin in the embryo; alpha-2 and alpha-1 produce hemoglobin in the fetus and adult. The beta-globin locus is located on chromosome 11. The order of the genes in the beta-globin cluster is epsilon, gamma-G, gamma-A, pseudobeta, delta, beta. Epsilon produces hemoglobin in the embryo, and gamma-G and gamma-A produce hemoglobin in the fetus. Delta and beta produce hemoglobin in the adult. What is the most likely mechanism for a gene sequence moving from one chromosome to another
Biology
1 answer:
Delicious77 [7]3 years ago
5 0

Answer:

Transposition to different chromosomes by the ancestral gene

Explanation:

Transposable Elements (TEs), also known as jumping genes, are genetic mobile elements which are able to move from one location to another on the genome. There are two major mechanisms of TE transposition: 1-cut-and-paste mechanism, where one particular TE is inserted into a new position on the genome without replication, and 2-copy-and-paste mechanism, where a new copy is generated and the original TE remains at the original genomic site. In this case, it is likely that new TE copies containing the ancestral (duplicated) gene have proliferated through the copy-and-paste mechanism.

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