The diploid number of chromosomes in the domestic horse (Equus caballus) is 64. Sex in horses is determined in the same way as in humans.
Which of the following represents a possible chromosome constitution of a functional sperm cell from a male horse?
31 autosomes+X31\text{ autosomes} + \text{X}31 autosomes+X
32 autosomes+Y32\text{ autosomes} + \text{Y}32 autosomes+Y
62 autosomes+XY62\text{ autosomes} + \text{XY}62 autosomes+XY
64 autosomes+X64\text{ autosomes} + \text{X}64 autosomes+X
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.