Add sequence to endpoint and use in Front

Closes #100

Closes #101

Try to also deal with #99 while sequences are getting loaded to the DB on dev

backend/metagenedb/api/catalog/filters/gene.py

 from django_filters import rest_framework as filters
-from metagenedb.apps.catalog.models import Gene, Taxonomy
+from metagenedb.apps.catalog.models import Function, Gene, Taxonomy
 
 
 class GeneFilter(filters.FilterSet):
@@ -21,7 +21,16 @@ class GeneFilter(filters.FilterSet):
     length__lt = filters.NumberFilter(
         field_name='length', lookup_expr='lt'
     )
+    taxonomy_id = filters.ModelChoiceFilter(
+        queryset=Taxonomy.objects.all(),
+        to_field_name='tax_id'
+    )
+    function = filters.ModelMultipleChoiceFilter(
+        queryset=Function.objects.all(),
+        field_name='functions__function_id',
+        to_field_name='function_id'
+    )
 
     class Meta:
         model = Gene
-        fields = ['taxonomy', 'functions', 'length', 'name']
+        fields = ['length', 'name']