Will all babies with a parent that is a dwarf have achondroplasia?

Not necessarily. Achondroplasia may be inherited as an autosomal dominant trait, meaning that getting the gene from 1 parent causes the child to have the disorder. If 1 parent has achondroplasia, the infant has a 50% chance of inheriting the disorder. If both parents have the condition, chances increase to 75%. However, most cases appear as spontaneous mutation, meaning 2 parents w/o it may have a child with it.
Not necessarily. Achondroplasia may be inherited as an autosomal dominant trait, meaning that getting the gene from 1 parent causes the child to have the disorder. If 1 parent has achondroplasia, the infant has a 50% chance of inheriting the disorder. If both parents have the condition, chances increase to 75%. However, most cases appear as spontaneous mutation, meaning 2 parents w/o it may have a child with it.