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TLS Online TPP Program

#Question id: 12490

Tay-Sachs disease shows autosomal recessive inheritance. Parents of a newly diagnosed affected child are referred for genetic counselling. It would be correct to tell them that:

#Unit 8. Inheritance Biology
  1. the probability that their next child will be affected is 1 in 2.
  2. the probability that the older unaffected sister of the affected child is a carrier is 1 in 2.
  3. the fact that their last child was affected means that their next three children will not be affected.
  4. the probability that each parent is a carrier is 1.
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TLS Online TPP Program

#Question id: 7698

#Unit 9. Diversity of Life Forms

Which tree shows the greatest evolutionary distance between chytrids and ascomycetes?


TLS Online TPP Program

#Question id: 11782

#Unit 7. System Physiology – Animal

Which of the following pairs of hormones and the corresponding action is incorrect?
TLS Online TPP Program

#Question id: 2473

#Unit 2. Cellular Organization

A microtubule protofilament is formed by the:
TLS Online TPP Program

#Question id: 24486

#Unit 3. Fundamental Processes

Splicing is an …………reaction that proceeds through a pentavalent phosphorous intermediate.
TLS Online TPP Program

#Question id: 5841

#Unit 8. Inheritance Biology

How are the BRCA proteins and their genes implicated in breast cancer?