Question 5. In humans, there are 3 alleles for blood type: A, B, O. A and B are co-dominant over O. A male with O type blood mates with a female with AB type blood.
The largest stadium in Spain is the Santiago Bernabaue in Madrid, it is Real Madrids stadium.
The three most popular sports in Spain are football (soccer), bullfighting, and cycling. Football is the most played sport in the country. One of the world's strongest football division is La Liga and has clubs such as FC Barcelona, Real Madrid, and Valencia CF.