Your friends Ben and Jane are contemplating having children and seek your genetic counsel. Ben and Jane are unrelated, but both have younger brothers with the same, extremely rare genetic trait. (In fact, Ben and Jane met at a support group meeting for children and families of children with this rare disorder.) Ben’s parents and Jane’s parents are all unaffected.          

Assume that the trait is autosomal dominant with 80% penetrance in heterozygotes and 100% penetrance in homozygotes. If not affected, what is the probability that the child is a carrier?

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#Question id: 17820

#I Life Science/ Life Sciences Group – I-V

During the RNA extraction guanidinium thiocyanate functions as a strong inhibitor of

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#Question id: 19616

#SCPH05 I Biotechnology

Which of the following is the right temperature coefficient (n) expression?

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#Question id: 13063

#SCPH01 Biochemistry

Precision will be reduced, but yield will be increased

Optimisation of a PCR reaction is often a compromise between the competing demands for precision, efficiency and yield. Although the specific effects may vary, generally, increasing the annealing temperature will increase non-specific primer binding and reduce precision. Increasing the length of the elongation phase will reduce the proportion of incomplete newly-synthesised strands and therefore increase yield. In this case, the potential effect on efficiency is unclear. Increasing the elongation phase would increase the reaction time, but the time taken to ramp down to a lower annealing temperature would be reduced.

Which of the statement is worng? Aminopetrin………s

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#Question id: 14091

#SCPH05 I Biotechnology

An example of a composite database:

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#Question id: 360

#SCPH28 | Zoology

Which of the following is considered to be a strong base (alkali)?