Repetitive DNA Sequences — NEET Biology
📚 Practice ConceptRepetitive sequences are stretches of DNA sequences that are repeated many times, sometimes hundred to thousand times. They are thought to have no direct coding functions, but they shed light on chromosome structure, dynamics and evolution.
Which of the following statements about the Human Genome Project (HGP) and its outcomes are NOT correct? S1: The Human Genome Project was primarily a 5-year initiative aimed at exclusively sequencing the coding regions of the human DNA. S2: Expressed Sequence Tags (ESTs) represented an approach focused on identifying all genes that are transcribed as RNA. S3: One of the major findings was that approximately 99.9% of nucleotide bases are identical in all humans, highlighting minimal genetic variation. S4: Repetitive DNA sequences, which form a significant portion of the human genome, are thought to have direct coding functions. S5: The project identified approximately 1.4 million locations of Single Nucleotide Polymorphisms (SNPs), which are crucial for tracing human history and disease association.
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