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. What is the probability that Ben and Jane’s first child will be affected? 

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#Question id: 2785

#Unit 2. Cellular Organization

Which of the following terms describes when a chromosome is replicated everywhere except the telomeres and centromere, but the daughter chromosomes do not separate?

TLS Online TPP Program

#Question id: 15188

#Unit 13. Methods in Biology

Electrophoretic mobility and Electroendosmostic force combinedly functions in

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#Question id: 17216

#Unit 7. System Physiology – Animal

What do you mean by negative feedback system?

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#Question id: 12719

#Unit 6. System Physiology – Plant

Which of the following is a key enzyme in the proline biosynthetic pathway?

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#Question id: 29584

#Unit 6. System Physiology – Plant

Cicadellidae (leaf hoppers), Fulgoroidae (plant hoppers), and Psyllidae (jumping plant lice) act as the vector for