class Dummy
{

   /**
     * @var  MagentoFrameworkMailTemplateTransportBuilder
     */
    private $_transportBuilder;

  public function __construct( MagentoFrameworkMailTemplateTransportBuilder $transportBuilder){

    $this->_transportBuilder = $transportBuilder;
  }

  public function sendEmail($templateId =1, $storeId =1,$templateParams)
  {

     $transport = $this->_transportBuilder->setTemplateIdentifier($templateId)
            ->setTemplateOptions(['area' => MagentoFrameworkAppArea::AREA_FRONTEND, 'store' => $storeId])
            ->setTemplateVars($templateParams)
            ->setFrom('someemail@email.com')
            ->addTo('toemail@email.com')
            ->setReplyTo('replyto@email.com')
            ->addBcc('bcc@email.com')
            ->getTransport();
        $transport->sendMessage();
  }

}

$senderName = 'test';

            $senderEmail = 'sender@test.com';

            $postObject = new MagentoFrameworkDataObject();
            $postObject->setData($emailTempVariables);

            $sender = [
                        'name' => $senderName,
                        'email' => $senderEmail,
                        ];

            $transport = $this->_transportBuilder->setTemplateIdentifier('myemail_email_template')
            ->setTemplateOptions(['area' => MagentoFrameworkAppArea::AREA_FRONTEND, 'store' => MagentoStoreModelStore::DEFAULT_STORE_ID])
            ->setTemplateVars(['data' => $postObject])
            ->setFrom($sender)
            ->addTo($email)
            ->setReplyTo($senderEmail)
            ->getTransport();
            $transport->sendMessage();