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2020_Y6T2_TP H1 Bio P2 QP.pdf - RAFFLES INSTITUTION 2020...

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© RI2020Term 2 Timed Practice 8876/2RAFFLES INSTITUTION2020 Year 6 Term 2 Timed PracticeHigher 1CANDIDATENAMECIVICSGROUP20 S 03INDEXNUMBERBIOLOGYPaper 2 Core PaperAdditional materials: Answer Sheet8876/226thMarch 20201 hour 30 minutesREAD THESE INSTRUCTIONS FIRSTWrite your index number, CT group & name on all the work you hand in.Write in dark blue or black pen on both sides of the paper.You may use a soft pencil for any diagrams, graphs or rough working.Do not use staples, paper clips, highlighters, glue or correction fluid.Section AAnswerallquestions.Section BAnswer the question.At the end of the examination,hand in your essay SEPARATELY.The number of marks is given in brackets [] at the end of each questionor part question.For Examiner’s UseSection A1/102/103/10Section B4/15MCQ/15Total/60This document consists of 6 printed pages.Raffles InstitutionInternal Examination
2© RI2020Term 2 Timed Practice 9744/2Section AAnswerallthe questions in this section.1In pigeons, the sex chromosomes are the Z chromosome and the W chromosome. Malepigeons are homogametic, ZZ, while female pigeons are heterogametic, ZW. Thetyrp1genethat is found on the Z chromosome determines feather colours in pigeons. The three alleles ofthetyrp1gene are:Zblthat codes for for blue feathersZarthat codes for ash-red feathersZbrthat codes for for brown feathers

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