You gain proficiency on Charisma checks involving humanoids. 

Your Strength score is increased by 1 and your Charisma score increases by 2.

Those born to a dragonborn mother grow quickly. They walk hours after hatching, attain the size and development of a 10-year-old human child by the age of 3, and reach adulthood by 15. They live to be around 80. Those born of a human mother grow as humans do, reaching adulthood at the age of 16. They live to be around 130.

Dragonborn/Humans range from good to evil,  chaotic to lawful,  and everything in between.

Those born of a Dragonborn mother tend to be taller and heavier than humans, standing well over 6 feet tall and averaging almost 250 pounds. Your size is Medium. Those of human mother birth can range from 4 to 7 feet tall and average around 150 to 250 pounds. Your size is Medium. 

Your base walking speed is 30 feet.

You have draconic ancestry. Choose one type of dragon from the Draconic Ancestry table. Your breath weapon and damage resistance are determined by the dragon type, as shown in the table.

You can use your action to exhale destructive energy. Your draconic ancestry determines the size, shape, and damage type of the exhalation. When you use your breath weapon, each creature in the area of the exhalation must make a saving throw, the type of which is determined by your draconic ancestry. The DC for this saving throw equals 8 + your Constitution modifier + your proficiency bonus. A creature takes 1d6 damage on a failed save, and half as much damage on a successful one. The damage increases to 2d6 at 6th level, 3d6 at 11th level, and 5d6 at 16th level. After you use your breath weapon, you can’t use it again until you complete a short or long rest.

You have resistance to the damage type associated with your draconic ancestry.

You can speak, read, and write Common, Draconic and one additional language. Draconic is thought to be one of the oldest languages and is often used in the study of magic. The language sounds harsh to most other creatures and includes numerous hard consonants and sibilants.