Question

how traits change - textbook summary directions: use the document linked above to fill in the blanks below. how can a trait change? 1. a is a permanent change in the sequence of dna. 2. most mutations occur 3. in a mutation, one nitrogen base is replaced by a different nitrogen base. 4. in an mutation, one or more nitrogen bases are added to the dna. 5. in a mutation, one or more nitrogen bases are left out of the dna sequence. what happens when a mutation occurs? 1 because mutations can change , they can cause traits to change.

Explanation:

Answer:

1. mutation
2. spontaneously (or due to errors in DNA replication, exposure to mutagens, etc. – but based on typical textbook content, "spontaneously" is a common fill - in here)
3. substitution
4. insertion
5. deletion

1 (the last "1" part): mutations

(Note: The answers for the fill - in - the - blank parts are based on standard biology textbook content about DNA mutations. For question 1, the term for a permanent change in DNA sequence is "mutation". For question 2, most mutations occur "spontaneously" (or other valid terms like due to replication errors, mutagens). Question 3 describes a substitution mutation, question 4 an insertion, question 5 a deletion. The last "1" part is about how mutations can cause traits to change, so the answer is "mutations".)