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5.1 Inheritance

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Question 22

A species of lizard (Anolis carolinensis) has a diploid chromosome number of 2n=362n = 362n=36. Sex determination in this species follows the XX/XY system, where males are the heterogametic sex (XY).

How many autosomes are present in a mature sperm cell from this lizard?

A

171717

B

181818

C

343434

D

353535

Markscheme

5.1 Inheritance Questions

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

186 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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