Figure 1.
Results under different forms of X inactivation in mule placenta samples. (A) Image of day 33 horse conceptus, showing fetal and placental tissues, including the invasive trophoblasts known as the chorionic girdle. (B) Transmission of X chromosome in male and female mules. (C) Expected results of allelic expression ratios for male mule and female mule under different forms of X inactivation.
