Singapore Junior Biology Olympiad Past Papers _hot_ ✯ ❲Recent❳

: Questions often require applying biological concepts to new scenarios rather than simple memorization.

In fruit flies ( Drosophila melanogaster ), eye color is a sex-linked trait. Red eyes ($R$) are dominant over white eyes ($r$). The gene is located on the X chromosome. singapore junior biology olympiad past papers

The SJBO consists of two main rounds with a unique distribution of difficulty levels: : : Questions often require applying biological concepts to

: You can access a massive archive of theory and practical questions on the IBO official website Secondary Resources The gene is located on the X chromosome

Because official papers are locked away, students typically prepare by looking elsewhere:

State the genotypes of both parents. [2 marks] (b) Draw a Punnett square to show the possible offspring. [2 marks] (c) Calculate the probability that a female offspring will have white eyes. [1 mark] (d) Explain why sex-linked traits are more commonly expressed in males than in females in mammals. [2 marks]