From d94508d5342b971fe5d375f47a7f53f66160998a Mon Sep 17 00:00:00 2001
From: Severiano Badajoz <sbadajoz@chanzuckerberg.com>
Date: Mon, 30 Sep 2019 15:21:21 -0700
Subject: [PATCH] fix bulk add failing on first gene in world (#954)

---
 client/src/components/geneExpression/index.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/client/src/components/geneExpression/index.js b/client/src/components/geneExpression/index.js
index 7fe4600a..49d2fd36 100644
--- a/client/src/components/geneExpression/index.js
+++ b/client/src/components/geneExpression/index.js
@@ -177,7 +177,7 @@ class GeneExpression extends React.Component {
 
           const indexOfGene = upperWorldGenes.get(upperGene);
 
-          if (!indexOfGene) {
+          if (indexOfGene === undefined) {
             return keepAroundErrorToast(
               `${
                 genes[upperGenes.get(upperGene)]