(A) P0 Chmp1a null pups are smaller than litter-mate controls.
(B) P0 Chmp1a null pups have smaller brains than controls. Note smaller olfactory bulbs and shorter anterior-posterior (A-P) length of the cortex.
(C) Body mass is reduced in Chmp1a null embryos. P0: control, n = 19; Chmp1a null, n = 3.
(D) Brain mass is reduced in Chmp1a null embryos. E14.5: control, n = 10; Chmp1a null, n = 5. E17.5: control, n = 23; Chmp1a null, n = 4. E18.5: control, n = 20; Chmp1a null, n = 3. P0: control, n = 9; Chmp1a null, n = 3.
(E) Cortical plate is 13% thinner in Chmp1a null embryos at E18.5. Control, n = 11; Chmp1a null, n = 5.
(F) Striatum area is reduced by 25% at E18.5 in Chmp1a null embryos compared to controls. Control, n = 8; Chmp1a null, n = 3.
(G) P0 midline section shows cerebellar hypoplasia (21% reduction of perimeter) in Chmp1a null pups compared to control littermates. Control, n = 7; Chmp1a null, n = 4.
(H) Quantification of (E)–(G).
Two-tailed t test, *p < 0.05, **p < 0.01, ***p < 0.001. Error bars are SEM.