What Is the Chance That Two Siblings Share Both HLA

question 17

Multiple Choice

What is the chance that two siblings share both HLA haplotypes, making them a good match for an organ transplant from one to the other?

• A) 100%
• B) 75%
• C) 50%
• D) 25%

---

Definitions:

Chilopods

A class of arthropods known as centipedes, characterized by elongated bodies with a pair of legs per segmented body part.

Arachnids

A class of joint-legged invertebrate animals in the subphylum Chelicerata, including spiders, scorpions, ticks, and mites.

Phylogeny

The evolutionary history and relationship among species or groups of organisms, often illustrated as a tree-like diagram showing divergent lines of descent.

Ecdysozoans

A major group of invertebrate animals including arthropods and nematodes, defined by their shared trait of molting an exoskeleton (ecdysis).