Complex sentence: For example the African clawed frog can have many defects at birth; for example, some of African Clawed frog's grow 6 toes on their feet or the frogs can have a 5th finger that resembles a thumb.
Split into simpler sentences: For example the African clawed frog can have many defects at birth; for example, some of African Clawed frog's grow 6 toes on their feet. Or the frogs can have a 5th finger that resembles a thumb.