Which of these ethnicities is least likely to have the Alu insertion?
Africans
Alu insertion frequency is lowest in Africans (0.463) and higher in Indians (0.544), E. Asians (0.557), and Europeans (0.559). Large genetic distances are observed among African populations and between African and non-African populations.
What is an Alu in genetics?
Alu elements are a type of “jumping gene,” or transposable element (TE), that exists only in primates. Like all TEs, they are discrete DNA sequences that move, or “jump,” from one place on the genome to another, sometimes inserting copies of themselves directly into the middle of protein-coding genes.
Why doesn’t everyone have the same number of Alu inserts?
This is because insertion of an Alu element occurs only 100 – 200 times per million years, and no known mechanism of deletion of one has been found.
How many alleles are there in PV92?
This experiment examines PV92, a human-specific Alu insertion on chromosome 16. The PV92 genetic system has only two alleles indicating the presence (+) or absence (-) of the Alu transposable element on each of the paired chromosomes. This results in three PV92 genotypes (++, +-, or –).
Is PV92 an Alu transposable element?
This experiment examines PV92, a human-specific Alu insertion on chromosome 16. The PV92 genetic system has only two alleles indicating the presence (+) or absence (-) of the Alu transposable element on each of the paired chromosomes.
What is the origin of the ALU gene?
Alu elements probably arose from a gene that encodes the RNA component of the signal recognition particle, which labels proteins for export from the cell. Alu is an example of a so-called “jumping gene” – a transposable DNA sequence that “reproduces” by copying itself and inserting into new chromosome locations.
How many ALU genes are in the human genome?
Human chromosomes contain about 1,000,000 Alu copies, which equal 10% of the total genome. Alu elements probably arose from a gene that encodes the RNA component of the signal recognition particle, which labels proteins for export from the cell.