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5.1 Inheritance

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Question 17

In the honeybee (Apis mellifera), sex is determined by a haplo-diploid system: females (queens and workers) are diploid (2n2n2n) and develop from fertilised eggs, while males (drones) are haploid (nnn) and develop from unfertilised eggs.

If a somatic muscle cell of a worker bee contains 32 chromosomes, how many chromosomes are present in a sperm cell produced by a drone bee?

A

888

B

161616

C

323232

D

646464

Markscheme

5.1 Inheritance Questions

  1. GCSE
  2. /Biology
  3. /5.1 Inheritance

97 exam-style questions on OCR GCSE Biology 5.1 Inheritance, covering 5.1.1 The genome, 5.1.2 Environment and phenotype, 5.1.3 Variants and mutations, 5.1.4 How genetic variants influence phenotype, 5.1.5 Asexual and sexual reproduction, 5.1.6 Haploid and diploid, 5.1.7 Meiotic cell division, 5.1.8 Single gene inheritance, 5.1.9 Predicting single gene crosses, 5.1.10 Sex determination, 5.1.11 Multiple gene inheritance, and 5.1.12 Development of our understanding of genetics. Each one has a worked solution and a mark scheme showing where the marks go.

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