#### Type
`inconsistency` for common use cases.
`bug` for projects relying on correct DOM emissions.

#### Description
It's unclear to me if the following is a known issue or not.
Take in consideration the snippet below:
```jsx
<input type="checkbox" defaultChecked={true} />
```
#### Current Behavior
Setting the `defaultValue` prop on inputs of other types sets both the `value` and `defaultValue` attribute on the DOM element.

When setting the `defaultChecked` prop on inputs of type `checkbox` only the `checked` attribute is correctly set, leaving the `defaultChecked` attribute unchanged.

#### Expected Behaviour
Like mentioned above, the expected behavior would be for the `defaultChecked` prop to set both the `checked` and `defaultChecked` attributes on the corresponding DOM node (like it's the case with the `defaultValue` prop).

const {updated} = this.state;
        const radioName = updated ? 'secondName' : 'firstName';
        return (
          <div>
            <button type="button" onClick={this.onClick} />
            <input
              type="radio"
              name={radioName}
              onChange={emptyFunction}
              checked={updated === true}
            />
            <input
              type="radio"
              name={radioName}
              onChange={emptyFunction}
              checked={updated === false}
            />
          </div>
        );
      }
    }
    const stub = ReactTestUtils.renderIntoDocument(<App />);
    const buttonNode = ReactDOM.findDOMNode(stub).childNodes[0];
    const firstRadioNode = ReactDOM.findDOMNode(stub).childNodes[1];
    expect(firstRadioNode.checked).toBe(false);