Displays your Adsense code after all single posts. Change the hook to change the location of displaying your ads and change the conditional tag to display on other pages. Style your ads using the adsense-style class as your selector.

Display Adsense After Post Content

add_action('genesis_after_post_content', 'adsense_after_posts');
function adsense_after_posts() {
if (is_single() )
    echo '<div class="adsense-style">Adsense goes here</div>';
}