Final answer:
Many conditional homozygous deletions produce a tumor phenotype, the incorrect description is option C: mucin-/- mice are tumor prone because they are incapable of asymmetric DNA strand allocation during stem cell replication.
Step-by-step explanation:
Mucin is a type of glycoprotein that plays a role in the protection and lubrication of various tissues. While it is true that mucin-/- mice may have other health issues related to the absence of mucin, their tumor proneness is not directly linked to asymmetric DNA strand allocation during stem cell replication. This description is not supported by the given information and is therefore incorrect.
In conclusion, out of the given descriptions, the incorrect one is option C: mucin-/- mice are tumor prone because they are incapable of asymmetric DNA strand allocation during stem cell replication.