achondroplasia Achondroplasia is a form of short-limbed dwarfism. The word achondroplasia literally means "without cartilage formation

All people with Achondroplasia have short stature. The average height of an adult male with Achondroplasia is 131 centimeters (4 feet, 4 inches), and the average height for adult females is 124 centimeters (4 feet, 1 inch).

Characteristic features of Achondroplasia include short arms and legs with particularly short upper arms and thighs, limited range of motion at the elbows, and an enlarged head with a prominent forehead. Fingers are typically short and the ring finger and middle finger may diverge, giving the hand a three-pronged appearance. People with achondroplasia are generally of normal intelligence.

Most dwarfism-related conditions are genetic disorders, but the causes of some disorders are unknown. Most occurrences of dwarfism result from a random genetic mutation in either the father's sperm or the mother's egg rather than from either parent's complete genetic makeupSome of the possible genotypes for the parents of a child with dwarfism is a RR mother, and a RR father, then 100 percent of their children will have dwarfism. If a both of the parents are Rr then 75 percent of their children will have dwarfism

by Chloe A. Nelson

biology hour 3

march 1 20017

Credits:

Created with images by Trondheim byarkiv - "untitled image" • Office of Governor Dan Malloy - "Bill Signing Ceremony for An Act Designating Spinal Muscular Atrophy with Respiratory Distress Awareness Day and Dwarfism Awareness Month" • Office of Governor Dan Malloy - "Bill Signing Ceremony for An Act Designating Spinal Muscular Atrophy with Respiratory Distress Awareness Day and Dwarfism Awareness Month" • Office of Governor Dan Malloy - "Bill Signing Ceremony for An Act Designating Spinal Muscular Atrophy with Respiratory Distress Awareness Day and Dwarfism Awareness Month" • auxesis - "X-rayed Mummy, Museum of Man, San Diego"

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