Cultivated seedless watermelons are triploid (3n3n3n) hybrid plants. They are produced by crossing a tetraploid (4n4n4n) parent plant, which has 44 chromosomes in its somatic cells, with a diploid (2n2n2n) parent plant, which has 22 chromosomes in its somatic cells.
How many chromosomes are present in a somatic cell of the resulting seedless triploid watermelon?
222222
333333
444444
666666
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.