diff --git a/code/__DEFINES/genetics.dm b/code/__DEFINES/genetics.dm
index 97f797b2718..3828392f99e 100644
--- a/code/__DEFINES/genetics.dm
+++ b/code/__DEFINES/genetics.dm
@@ -107,3 +107,7 @@
 #define GENE_INSTABILITY_MINOR 5
 #define GENE_INSTABILITY_MODERATE 10
 #define GENE_INSTABILITY_MAJOR 15
+
+#define GENETIC_DAMAGE_STAGE_1 80
+#define GENETIC_DAMAGE_STAGE_2 65
+#define GENETIC_DAMAGE_STAGE_3 35
diff --git a/code/game/dna/genes/gene.dm b/code/game/dna/genes/gene.dm
index a3781f9985d..f74d0c7d2a0 100644
--- a/code/game/dna/genes/gene.dm
+++ b/code/game/dna/genes/gene.dm
@@ -100,7 +100,7 @@
 	var/mutation=0
 
 	// Activation probability
-	var/activation_prob=45
+	var/activation_prob=100
 
 	// Possible activation messages
 	var/list/activation_messages=list()
diff --git a/code/modules/mob/living/carbon/human/life.dm b/code/modules/mob/living/carbon/human/life.dm
index 8951b21bc74..a7e451bcc7e 100644
--- a/code/modules/mob/living/carbon/human/life.dm
+++ b/code/modules/mob/living/carbon/human/life.dm
@@ -176,22 +176,22 @@
 		if(gene.is_active(src))
 			speech_problem_flag = 1
 			gene.OnMobLife(src)
-	if(gene_stability < 85)
+	if(gene_stability < GENETIC_DAMAGE_STAGE_1)
 		var/instability = DEFAULT_GENE_STABILITY - gene_stability
-		if(prob(instability / 10))
-			adjustFireLoss(min(6, instability / 12))
+		if(prob(instability * 0.1))
+			adjustFireLoss(min(5, instability * 0.67))
 			to_chat(src, "<span class='danger'>You feel like your skin is burning and bubbling off!</span>")
-		if(gene_stability < 70)
-			if(prob(instability / 12))
-				adjustCloneLoss(min(5, instability / 15))
+		if(gene_stability < GENETIC_DAMAGE_STAGE_2)
+			if(prob(instability * 0.83))
+				adjustCloneLoss(min(4, instability * 0.05))
 				to_chat(src, "<span class='danger'>You feel as if your body is warping.</span>")
-			if(prob(instability / 10))
-				adjustToxLoss(min(6, instability / 12))
+			if(prob(instability * 0.1))
+				adjustToxLoss(min(5, instability * 0.67))
 				to_chat(src, "<span class='danger'>You feel weak and nauseous.</span>")
-			if(gene_stability < 40 && prob(1))
+			if(gene_stability < GENETIC_DAMAGE_STAGE_3 && prob(1))
 				to_chat(src, "<span class='biggerdanger'>You feel incredibly sick... Something isn't right!</span>")
 				spawn(300)
-					if(gene_stability < 40)
+					if(gene_stability < GENETIC_DAMAGE_STAGE_3)
 						gib()
 
 	if(!(species.flags & RADIMMUNE))