genesis_child_body_weight_function.php

<?php // Remove when using this snippet
function child_load_google_fonts() {
  	
  	// Setup font arguments
	$query_args = array(
		'family' => 'Lato:300,400,500,700', // Notice the new 400 weight!!!
	);
 
 	// A safe way to register a CSS style file for later use
	wp_register_style( 'google-fonts', add_query_arg( $query_args, "//fonts.googleapis.com/css" ), array(), null );
	
	// A safe way to add/enqueue a CSS style file to a WordPress generated page
	wp_enqueue_style( 'google-fonts' );
}
add_action( 'wp_enqueue_scripts', 'child_load_google_fonts' );