03c Sex Determination and the Occurrence of Twins
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SPM Form 4 Science Chapter 3
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Question 1 of 5
1. Question
1 pointsDiagram below shows the determination of sex in humans.
Which of the following are the cells of a male child?
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The correct answer is “Q and S”.
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Question 2 of 5
2. Question
1 pointsDiagram shows the stage in the human reproductive system.
Which of the following represent stages X, Y and Z?
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The correct answer is “Process X=Meiosis, Process Y=Meiosis, Process Z=Fertilisation”.
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Question 3 of 5
3. Question
1 pointsDiagram shows a type of cell division in ovary.
Which of the following shows the chromosome content in gametes M and N?
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The correct answer is “M=22+X, N=22+X”.
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Question 4 of 5
4. Question
1 pointsWhich of the following are true about non identical twins?
I. Two sperms fertilise two ova
II. Different appearances
III. Share one placenta in mother’s uterusCorrect
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The correct answer is “I and II only”.
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Question 5 of 5
5. Question
1 pointsDiagram shows the how the sex of offspring is determined in human beings.
What is the probability of getting a baby boy at birth?
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The correct answer is “½”.