Wnt9b is expressed in the ureteric bud of the kidney at all stages of development. The Wnt9b cneo allele functions as a partial loss of function. Wnt9bcneo/cneo mutant kidneys initially develop normally but exhaust their nephron progenitor cells by E15.5. Here, we have compared expression between Wnt9bcneo/+ and Wnt9bcneo/cneo kidneys. Additional urogenital tissue (adrenal glands, reproductive tracts and bladder) may have been included in some samples.