03b The Principles and Mechanism of Inheritance
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SPM Form 4 Science Chapter 3
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Question 1 of 4
1. Question
1 pointsDiagram shows the inheritance of height in humans. Gene T and gene t represent dominant and recessive gene respectively.
What percentage of their offspring in the first generation is tall?
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The correct answer is “50%”.
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Question 2 of 4
2. Question
1 pointsDiagram shows the inheritance of colour in a type of flower. Gene R and gene r represent red (dominant) and white (recessive) gene respectively.
What is the ratio of the number of red young flowers to the number of white young flowers in the F1 generation?
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The correct answer is “4:0”.
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Question 3 of 4
3. Question
1 pointsDiagram shows the inheritance of height in a family. Gene T and gene t represent tall (dominant) and short (recessive) gene respectively. In this case, both the parents are tall (Tt).
What is the probability of obtaining a tall child?
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The correct answer is “75%”.
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Question 4 of 4
4. Question
1 pointsWhich of the following shows a dominant trait?
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The correct answer is “Curly hair”.