Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. cats that have coats that are a patchwork of black and orange are called tortoiseshell cats, are typically female, and have genes that code for both black fur (xo) and orange fur (xo) located on the x chromosomes. y chromosomes do not code for color in tortoiseshell cats. a female cat that has only orange fur (xoxo) is crossed with a male cat that has only black fur (xoy). how many of the offspring will exhibit tortoiseshell coloring? 1 in 4. 2 in 4. 3 in 4. 4 in 4.