Ports https://github.com/tgstation/tgstation/pull/50225

code/datums/dna.dm

@@ -15,6 +15,7 @@
 	var/mob/living/holder
 	var/delete_species = TRUE //Set to FALSE when a body is scanned by a cloner to fix #38875
 	var/mutation_index[DNA_MUTATION_BLOCKS] //List of which mutations this carbon has and its assigned block
+	var/default_mutation_genes[DNA_MUTATION_BLOCKS] //List of the default genes from this mutation to allow DNA Scanner highlighting
 	var/stability = 100
 	var/scrambled = FALSE //Did we take something like mutagen? In that case we cant get our genes scanned to instantly cheese all the powers.
 	var/skin_tone_override //because custom skin tones are not found in the skin_tones global list.
@@ -58,6 +59,7 @@
 		H.give_genitals(TRUE)//This gives the body the genitals of this DNA. Used for any transformations based on DNA
 	if(transfer_SE)
 		destination.dna.mutation_index = mutation_index
+		destination.dna.default_mutation_genes = default_mutation_genes
 
 	destination.dna.update_body_size(old_size)
 
@@ -66,6 +68,7 @@
 /datum/dna/proc/copy_dna(datum/dna/new_dna)
 	new_dna.unique_enzymes = unique_enzymes
 	new_dna.mutation_index = mutation_index
+	new_dna.default_mutation_genes = default_mutation_genes
 	new_dna.uni_identity = uni_identity
 	new_dna.blood_type = blood_type
 	new_dna.skin_tone_override = skin_tone_override
@@ -159,15 +162,18 @@
 	if(!LAZYLEN(mutations_temp))
 		return
 	mutation_index.Cut()
+	default_mutation_genes.Cut()
 	shuffle_inplace(mutations_temp)
 	if(ismonkey(holder))
 		mutations |= new RACEMUT(MUT_NORMAL)
 		mutation_index[RACEMUT] = GET_SEQUENCE(RACEMUT)
 	else
 		mutation_index[RACEMUT] = create_sequence(RACEMUT, FALSE)
+	default_mutation_genes[RACEMUT] = mutation_index[RACEMUT]
 	for(var/i in 2 to DNA_MUTATION_BLOCKS)
 		var/datum/mutation/human/M = mutations_temp[i]
-		mutation_index[M.type] = create_sequence(M.type, FALSE,M.difficulty)
+		mutation_index[M.type] = create_sequence(M.type, FALSE, M.difficulty)
+		default_mutation_genes[M.type] = mutation_index[M.type]
 	shuffle_inplace(mutation_index)
 
 //Used to generate original gene sequences for every mutation
@@ -372,8 +378,8 @@
 	return dna
 
 
-/mob/living/carbon/human/proc/hardset_dna(ui, list/mutation_index, newreal_name, newblood_type, datum/species/mrace, newfeatures)
-
+/mob/living/carbon/human/proc/hardset_dna(ui, list/mutation_index, list/default_mutation_genes, newreal_name, newblood_type, datum/species/mrace, newfeatures, list/mutations, force_transfer_mutations)
+//Do not use force_transfer_mutations for stuff like cloners without some precautions, otherwise some conditional mutations could break (timers, drill hat etc)
 	if(newfeatures)
 		var/old_size = dna.features["body_size"]
 		dna.features = newfeatures
@@ -397,6 +403,10 @@
 
 	if(LAZYLEN(mutation_index))
 		dna.mutation_index = mutation_index.Copy()
+		if(LAZYLEN(default_mutation_genes))
+			dna.default_mutation_genes = default_mutation_genes.Copy()
+		else
+			dna.default_mutation_genes = mutation_index.Copy()
 		domutcheck()
 
 	SEND_SIGNAL(src, COMSIG_HUMAN_HARDSET_DNA, ui, mutation_index, newreal_name, newblood_type, mrace, newfeatures)
@@ -488,8 +498,11 @@
 	. = TRUE
 	if(on)
 		mutation_index[HM.type] = GET_SEQUENCE(HM.type)
+		default_mutation_genes[HM.type] = mutation_index[HM.type]
 	else if(GET_SEQUENCE(HM.type) == mutation_index[HM.type])
 		mutation_index[HM.type] = create_sequence(HM.type, FALSE, HM.difficulty)
+		default_mutation_genes[HM.type] = mutation_index[HM.type]
+
 
 /datum/dna/proc/activate_mutation(mutation) //note that this returns a boolean and not a new mob
 	if(!mutation)

code/datums/mutations/_mutations.dm

@@ -191,3 +191,23 @@
 	power.panel = "Genetic"
 	owner.AddSpell(power)
 	return TRUE
+
+// Runs through all the coefficients and uses this to determine which chromosomes the
+// mutation can take. Stores these as text strings in a list.
+/datum/mutation/human/proc/update_valid_chromosome_list()
+	valid_chrom_list.Cut()
+
+	if(can_chromosome == CHROMOSOME_NEVER)
+		valid_chrom_list += "none"
+		return
+
+	valid_chrom_list += "Reinforcement"
+
+	if(stabilizer_coeff != -1)
+		valid_chrom_list += "Stabilizer"
+	if(synchronizer_coeff != -1)
+		valid_chrom_list += "Synchronizer"
+	if(power_coeff != -1)
+		valid_chrom_list += "Power"
+	if(energy_coeff != -1)
+		valid_chrom_list += "Energetic"