Question

9 multiple choice 2 points the type of mutation shown below is a original gene g a c c t t c a g g t a g g g a c t t t g mutated gene g a c c t t a a g g t a g g g a c t t t g frameshift - deletion point frameshift - insertion 10 multiple choice 2 points about how many genes comprise the human genome? 120,000 3 billion 20,000 15,000 11 multiple answer 2 points what is an example of something that might cause an induced mutation? select all that apply. smoking radiation x - rays intense exercise

Explanation:

• For question 9: By comparing the original and mutated genes, we see a single - base change. A point mutation is a change in a single nucleotide. Frameshift - deletion and frameshift - insertion would shift the reading frame and involve more than one base change in a non - multiple - of - three way.
• For question 10: The human genome is estimated to have about 20,000 protein - coding genes. 120,000 is too high, 3 billion is the number of base pairs, and 15,000 is lower than the estimate.
• For question 11: Induced mutations are caused by mutagens. Smoking contains mutagens, radiation (including X - rays) are well - known mutagens. Intense exercise does not typically cause induced mutations at the genetic level.

Answer:

1. point
2. 20,000
3. smoking, radiation, X - rays