Ch. 8 HW ans key - Ch. 8 HW answer key 092209 MCQ: 1) 2) 3)...

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Ch. 8 HW answer key 092209 MCQ: 1) C 2) C 3) B 4) A 5) E T/F: 1) T 2) F 3) F 4) T 5) F 6) T 7) T Match the following: 1) g 2) f 3) j 4) a 5) i 6) h 7) c 8) b 9) d 10) e SQ: 1) Pracentric inversion does not include the centromere; pericentric does. 2) Like inversions, translocations can produce phenotypic effects if the translocation breakpoint disrupts the gene or if the gene near the breakpoint is altered in its expression because of relocation to a different chromosomal environment (position effect). 3) Primary Down syndrome is caused by spontaneous, random nondisjunction of chromosome 21, leading to Trisomy 21. Familial DS arises from Robertsonian translocation between chromosome 21 and 14. Translocation carriers do not have
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DS, but their children have an increased incidence of it. If the translocated chromosome segregates with a normal 21, the gametes will have two copies of chromosome 21 and result in DS. 4)
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Ch. 8 HW ans key - Ch. 8 HW answer key 092209 MCQ: 1) 2) 3)...

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