breaks at or near the centromeres of two acrocentric chromosomes breaks at or ne

Question

breaks at or near the centromeres of two acrocentric chromosomes breaks at or near the centromeres of two metacentric chromosomes breaks at or near the centromeres of one acrocentric and one metacentric chromosome breaks in a large and a small chromosome transposable elements A single cross over event within gene C of the chromatids below will result in which of the following? A B C D and A C B D A B B D and A D A C D and A B B D A B C D and A C B D A B C D and A B C D A B C B D and A C D Familial Down's syndrome results from: trisomy of chromosome 21 as a result of meiotic nondisjunction loss of the small arm of chromosome 21 following a Robertsonian translocation in somatic tissue production of a large metacentric chromosome containing the long arm of chromosome 21 in germ tissue fertilization events between 2 parents with trisomy 21 all of the above can cause familial Down's syndrome Normal cells avoid becoming cancerous when their DNA is damaged by: preventing cell division inducing DNA synthesis activating RB activating p53 a and d The gene product RB is associated with: controlling when the cell enters S phase preventing S phase when DNA damage is present initiating apoptosis spindle fibre formation all of the above When DNA damage cannot be repaired, cells normally enter apoptosis to prevent mutations from being perpetuated. This is induced by: accumulation of RB accumulation of p53 telomerase necrosis senescence

Explanation / Answer

Q96). e

Q97). e

Q98). a

Q99). a

Q100). b

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