GENETICS QUESTION: 1983               L PETERSON/AP BIOLOGY

   State the conclusions reached by Mendel in his work on the inheritance of   
  characteristics. Explain how each of the following deviates from these conclusions:
	A. Autosomal linkage
	B. Sex-linked (X-linked) inheritance
	C. Polygenic (multiple-gene) inheritance

 
  
  STANDARDS:
    maximum = 15 points total
  
    MENDEL (8 points maximum):
     DISCRETE UNITS
     2 FACTORS/TRAIT
     DOMINANT/RECESSIVE
  
     PUNNETT SQUARE:
        GAMETES HAVE 1 FACTOR
        EQUAL # GAMETES (EACH TYPE)
        FACTORS SEGREGATE WHEN GAMETES FORM (SEGREGATION)
        RANDOM DISTRIBUTION OF FACTORS (INDEPENDENT ASSORTMENT)
     USE OF PROBABILITY
  
    DEVIATIONS (12 points maximum):
     AUTOSOMAL LINKAGE:    DEFINITION (1)
                          EXAMPLE (1)
                          EXPECTED DEVIATION (1)
     SEX-LINKED:               DEFINITION (1)
                          EXAMPLE (1)
                          EXPECTED DEVIATION (1)
     POLYGENIC:                DEFINITION (1)
                          EXAMPLE (1)
                          EXPECTED DEVIATION (1)