Fig 15.4 Figure 15.4 The chromosomal basis of Mendel's laws All F1 plants produce yellow round seeds ( YyRr ). F1 Generation LAW OF SEGREGATION LAW OF INDEPENDENT ASSORTMENT The two alleles for each gene separate Alleles of genes on nonhomologous during gamete formation. As an chromosomes assort independently during example, follow the fate of the long gamete formation. As an example, follow chromosome pair (carrying R and r ). Read the numbered explanations both the long and short chromosome pair along both paths. Read the numbered below. explanations below. (1) The R and r alleles segregate Chapter 15: The Chromosomal Basis of Inheritance the figure below. haploid gametes 10. Going back to chromosome arrangement in meiosis, when do the two events you illustrated in question 9 occur? 11. To demonstrate that you understand this concept, consider a cell with two pairs of chromosomes. Sketch the four different ways these chromosomes might be arranged during metaphase I of meiosis..