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TLS Online TPP Program

#Question id: 12488

Retinoblastoma usually occurs as a sporadic event but in around 10% of cases there is a positive family history due to autosomal dominant inheritance. In these families the penetrance is approximately 80% (= 0.8). A woman with retinoblastoma, whose father and grandfather were also affected, has an unaffected partner with no relevant family history. Which of the following is correct regarding their children?

#Unit 8. Inheritance Biology
  1. The probability that their first child will be affected is 0.25.
  2. The probability that their first child will be affected is 0.4.
  3. The probability that each of their children will be affected is 0.5.
  4. The probability that each of their children will be affected is 0.4 X 0.5.
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TLS Online TPP Program

#Question id: 95

#Unit 1. Molecules and their Interaction Relevant to Biology

What is the name of the disaccharide shown below that is formed by joining two monomers of D-glucose
TLS Online TPP Program

#Question id: 19182

#Unit 13. Methods in Biology

Generally, amplification is carried out between the PCR primers. But if amplification is carried out outside the primers, it is called as __________
TLS Online TPP Program

#Question id: 20400

#Unit 3. Fundamental Processes

There are four rules of parity given by Erwin Chargaff which of the following applies more closely to introns than exons
TLS Online TPP Program

#Question id: 12160

#Unit 9. Diversity of Life Forms

Which of these was not derived from an ancestral alpha proteobacterium?
TLS Online TPP Program

#Question id: 2639

#Unit 2. Cellular Organization

A Lac repressor is a tetramer repressed when bound to the inducer. The trp repressor is a ____________________