If someone is born with a defective gene, it will be found in a. all DNA in their body

b. in some cells

c. only their nervous system

b

Explanation:

It will only be found in some cells because when a mutation is formed it will most likely not be able to spread

b is the best answer for this question.

answer: although many types of viruses can cause a common cold, rhinoviruses are the most common culprit. a cold virus enters your body through your mouth, eyes or nose. the virus can spread through droplets in the air when someone who is sick coughs, sneezes or talks. theres your answer

explanation: