Final answer:
The correct option is 1) Irritability.
Irritability is a personality trait that Maria likely inherited from her birth parents, as behavioral genetics research points to the heritability of many personality traits, such as those related to temperament.
Step-by-step explanation:
The personality trait that Maria is quite likely to have inherited from one of her birth parents is irritability. Studies in the field of behavioral genetics, including the well-known Minnesota Study of Twins Reared Apart, have shown that many personality characteristics including irritable dispositions have a strong genetic component. These aspects of personality can be influenced by heritability, which denotes the proportion of difference among people attributed to genetics.
In the study of twins, it was found that identical twins, whether raised together or apart, often have similar personalities, suggesting a genetic basis for these traits. While environmental factors and modeling can also play a role, traits such as temperament, which includes typical expressions of emotion like irritability, are rooted in one's genetic makeup.