Threshold characteristics display only two possible phenotypes—the trait is either present or absent.

TLS Online TPP Program

#Id: 9386

#Unit 11. Evolution and Behavior

TLS Online TPP Program

#Id: 6936

#Unit 8. Inheritance Biology

Inversions that do not include the centromere, are termed paracentric inversions 

TLS Online TPP Program

#Id: 7863

#Unit 1. Molecules and their Interaction Relevant to Biology

TLS Online TPP Program

#Id: 6347

#Unit 8. Inheritance Biology

Y-Linked Characteristics

Y-linked traits—also called holandric traits—exhibit a distinct pattern of inheritance.  These traits are present only in males, because only males possess a Y chromosome, and are always inherited from the father.

TLS Online TPP Program

#Id: 4911

#Unit 13. Methods in Biology

Variance always has squared units. For example, the variance of a set of weights estimated in kilograms will be given in kg squared.