Multiple Choice
Twins are said to be concordant for a trait when
A) both twins exhibit the trait.
B) only identical twins exhibit the trait.
C) only fraternal twins exhibit the trait.
D) fraternal twins more often show the trait than identical twins.
E) None of these is true.
Correct Answer:

Verified
Correct Answer:
Verified
Q29: Name five human traits that could be
Q30: If a trait is genetically determined, the
Q31: According to the threshold model, for a
Q32: _ traits are those that result from
Q33: Many studies have been conducted on the
Q35: The correlation coefficient for totally unrelated people
Q36: Concordance values for twins are only useful
Q37: Which statement about the interaction between genes
Q38: _ twins result from a single fertilization
Q39: Davenport and Davenport estimated that two genes