Preimplantation Genetic Diagnosis Is Done

question 37

Multiple Choice

Preimplantation genetic diagnosis is done:

• A) on cells of an in vitro fertilized embryo
• B) in the womb, before birth
• C) after a woman is pregnant, but before the embryo implants
• D) with the help of ultrasound
• E) before fertilization on the sperm and the egg

---

Definitions:

Gametes

Gametes are reproductive cells (sperm in males and eggs in females) that fuse during fertilization to form a zygote, initiating the development of a new organism.

RNA Interference

In this biological process, RNA molecules counteract gene expression or translation by neutralizing particular mRNA molecules.

Cleaving DNA

The process of making precise breaks in the strands of DNA, often used in genetic engineering and molecular biology studies.

Hox Genes

Clusters of homeobox-containing genes that specify the anterior–posterior axis of various animals during development.