What would happen if you were born with two y chromosomes?

Question: What would happen if you were born with two y chromosomes?
- Keywords:
  chromosome,
  gender,
  genetics
Asked by to Paul, Oliver, Judith, Gill, Gemma, Emma on 3 Jan 2019. This question was also asked by .
- Gemma Chandratillake answered on 3 Jan 2019:
  
  Humans need at least one X chromosome but males can have one X and two Ys, this condition is called XYY syndrome:
  https://rarediseases.info.nih.gov/diseases/5674/47-xyy-syndrome
  
  XYY Syndrome
  
  https://ghr.nlm.nih.gov/condition/47xyy-syndrome

Question: What would happen if you were born with two y chromosomes?