--- a
+++ b/load_genome.py
@@ -0,0 +1,24 @@
+from Bio import SeqIO
+
+def load_genome(genome_id):
+    # Load the extraterrestrial genome sequence from a specified database
+    # and return the DNA sequence
+    # Replace 'database' with the actual database name or API call
+    genome_sequence = 'database.get_sequence(genome_id)'
+    return genome_sequence
+
+def edit_genome(genome_sequence, target_gene_sequence, modification):
+    # Perform targeted gene editing using the CRISPR-Cas9 system
+    # Replace the following code with the actual CRISPR-Cas9 implementation
+    edited_sequence = genome_sequence.replace(target_gene_sequence, modification)
+    return edited_sequence
+
+# Example usage
+genome_id = 'ET123'
+target_gene_sequence = 'ATGCTGACGT'
+modification = 'ATGCTGCCGT'
+genome_sequence = load_genome(genome_id)
+edited_sequence = edit_genome(genome_sequence, target_gene_sequence, modification)
+
+# Output the modified genome sequence in a markdown code block
+print(f"```\n{edited_sequence}\n```")