How to send dropdown name with value as json - Laravel 5.1

I have this code below which is being used with other select boxes to build up a genetics[] array. This posts fine to the database however I want to put the select box's name along with the value and use it as JSON.

Currently this is the code I have for 2 boxes:

<div class="form-group">
    <label for="genetics">Bell Albino</label>
    <?php $options = array('na' => 'N/A', 'BA' => 'Visual', 'ba' => 'Recessive'); ?>
    {!! Form::select('genetics[]', $options, Request::old('genetics[]'), array('class' => 'form-control')) !!}
</div>
<div class="form-group">
    <label for="genetics">Tremper Albino</label>
    <?php $options = array('na' => 'N/A', 'TA' => 'Visual', 'ta' => 'Recessive'); ?>
    {!! Form::select('genetics[]', $options, Request::old('genetics[]'), array('class' => 'form-control')) !!}
</div>

When I hit save, it saves to the database like this:

['BA', 'ta'] for example. Selecting Visual from the first list and Recessive from the second.

I'd like to save it as something like this:

['bell-albino':'BA','tremper-albino':'ta']

Is this possible and if so what's the best way to do this?

via Chebli Mohamed