1. proportionality

2. Sometimes a small thing can have a big effect

3. Sometimes a small thing can have a big effect
The effect of breakfast is disproportionate to its size.

4. proportion Portion (n): Part of a whole
Proportionate (adj): Similar in degree, size, or intensity
See proportional
Disproportionate (adj): Different in degree, size, or intensity
Especially: Larger or smaller than you expect

5. Usage
X is disproportionate to Y (X is bigger than you would expect based on Y)
X is disproportionately adj (X is more adj than you would normally expect)
What has a disproportionate effect on your mood?
What is disproportionately expensive in Irvine?
What proportion of this class is female?
What jobs are disproportionately female?

6. Sometimes, things are more common than you expect

7. overrepresented
Scandinavians are overrepresented among Nobel prize winners
African-Americans are overrepresented in professional sports
Siberian Huskies are overrepresented among dogs in Orange County

8. Usage
X is/are overrepresented in/among Y (X is more common than you would expect)
What types of people are overrepresented among politicians?