Question

If a person is homozygous for the presence of an ALU repeat in the PV92 region, you would expect the size of the DNA fragment to be compared to those with no ALU repeats.​

Answer 1

Explanation:

If a person is homozygous for the presence of an ALU repeat in the PV92 region, you would expect the size of the DNA fragment to be smaller compared to those with no ALU repeats.

Answer 2

If a person is homozygous for the presence of an ALU repeat in the PV92 region, you would expect the size of the DNA fragment to be compared to those with no ALU repeats.​

• If a person is homozygous for the presence of an ALU repeat in the PV92 region, you would expect the size of the DNA fragment to be smaller compared to those with no ALU repeats.
• Transposons, or transposable elements, are regions of DNA that can be copied and moved from one region of the genome to another.
• Because transposons tend to get duplicated, they can occur many times in an organism's genome, and because they tend to get inserted at new locations, these repeated DNA sequences can be scattered throughout the genome.
• Transposons exist in all kinds of organisms, but the Alu transposon is unique to primates.
• The Alu transposon is a short sequence (300 nucleotides, compared to the 3 billion nucleotides of the haploid human genome) that has been duplicated and inserted in the genome over a million times, making up over 10% of the human genome.

• All humans have the Alu transposon, and most of those Alu elements are in the exact same locations in every human genome.
• In other words, most of these Alu insertions are conserved.
• This indicates that these Alu insertions existed at the very beginning of the evolution of humans.
• On the other hand, there are a few Alu elements that are polymorphic, meaning that they are present in some individuals but not others.
• This suggests that these copies of Alu have been inserted in their new locations fairly recently.