____ 2.  Inability to produce pigment melanin

____3.  A blood protein which is inherited as a dominant 
             trait and can cause erythroblastosis fetalis

____ 4.  Gene expression is different in males & females,
     Ex:  baldness

____ 5.  X-linked trait that affects 8% of the male 
               population, lack of vision protein--opsins

____ 6.  Most frequent genetic disease found among
              individuals of African descent, 1 in 12 carrier

____ 7.  Inheritance pattern of roan shorthorn cattle
              and of pink four o'clocks

____ 8.  Genotype:  XXY

____ 9.  X-linked trait  known as "Bubble Boy" Disease,
     males lack T and B lymphocytes

_____10. Trisomy 21

____ 11. The only viable human monosomy

____ 12. Free-bleeders disease, X-linked

____ 13.  Type of inheritance expressed by A&B of the
                A,B,O blood group antigens

____ 14. Known as hemochromatosis, 1 in 8 is carrier, 
               1 in 200 affected

____ 15. Typically expressed in only 1 sex, beard growth

____ 16. Excess production of mucus by exocrine glands

____ 17. A Y-linked trait

B. Kleinfelter syndrome

C. sex-limited trait

D. SCID

E. Rh factor

F. Turner syndrome

G. holandric

H. PKU disease

I. Iron Overload
Disease

J. Sickle Cell Anemia

K. albinism

L. co-dominance

M.  Down syndrome

N. sex-influenced
trait

O.  incomplete dominance

P. hemophilia A

Q. cystic fibrosis