Final answer:
Highly repetitive DNA sequences in eukaryotes are repeated multiple times in the genome and can be found in different parts of the genome. Examples include telomeric DNA and transposons. These repetitive sequences have specific functions and are not considered "junk DNA."
Step-by-step explanation:
The term "Highly Repetitive DNA" refers to a type of DNA sequence in eukaryotes that is repeated multiple times in the genome. These repetitive sequences can be found in different parts of the genome and vary in length. Examples of highly repetitive DNA include satellite DNA and transposons.
One example of highly repetitive DNA is telomeric DNA, which adds repetitive nucleotide sequences to the ends of eukaryotic chromosomes, thereby lengthening them. Another example is transposable elements, also known as "jumping genes," which can make up a significant portion of a genome.
Overall, highly repetitive DNA plays various roles in the genome and can have specific functions, such as regulating gene expression and increasing genetic diversity. It is not considered "junk DNA," as it has evolved under selection pressures. However, the exact functions of all repetitive DNA sequences are still being studied.