Chromosomal Changes — Quiz

Question 1

A chromosome has an inversion. Which describes a pericentric inversion?

Revolt · Accepted Answer

switching of genes around the centromere

Question 2

Which chromosomal defect is caused when part of a chromosome breaks off and reattaches backward on the same chromosome?

Revolt · Accepted Answer

inversion

Question 3

Why does prolonged exposure to UV light from the Sun or tanning beds increase the risk for getting skin cancer?

Revolt · Accepted Answer

increased exposure to UV light increases the risk of a mutation occurring

Question 4

Which of these precautions should be taken to reduce the risk of chromosome mutations?

Revolt · Accepted Answer

wear a lead protective shield when having teeth X-rays

Question 5

Which best describes chromosomal deletion?

Revolt · Accepted Answer

occurs when part of a chromosome breaks off and does not reattach

Question 6

If nondisjunction occurs and an individual survives, which disorder can occur?

Revolt · Accepted Answer

Klinefelter syndrome

Question 7

Which term describes a permanent change to a genetic sequence?

Revolt · Accepted Answer

mutation

Question 8

Which best describes the process of insertion?

Revolt · Accepted Answer

occurs when part of a chromosome breaks off and is placed into the middle of another chromosome

Question 9

Which agent would cause the least damage to a chromosome?

Revolt · Accepted Answer

ultrasound

Chromosomal Changes — Quiz Answers