vision/eye
lens vacuoles
(
J:13464
)
• histologically, the lens shows small vacuoles at birth
|
nervous system
spina bifida
(
J:13464
)
• homozygotes may have caudal spina bifida
• spina bifida is present in all homozygous embryos at 11 to 12 days of gestation, but is visible in only one-third to one-half of them at birth; if the defect is not too severe, the lesion heals and the mice survive
|
pigmentation
belly spot
(
J:13464
)
• although the lens defect is the most consistent landmark, occasionally homozygotes have only a white belly spot
|
hematopoietic system
N |
• no aberrant bleeding time after tail vein nick
|
embryo
• the caudal neural folds in vl/vl homozygotes display larger dorsolateral and ventral angles that normal at the 22--28 somite embryonic stage
• at the 30-35 somite stage, the ventral angles remain larger than normal, but the dorsolateral angles are smaller than normal, indicating a medial collapse of the dorsal ends of the neural folds
• a defect in microfilaments may underly this abnormal bending of the neuroepithelium
|
spina bifida
(
J:13464
)
• homozygotes may have caudal spina bifida
• spina bifida is present in all homozygous embryos at 11 to 12 days of gestation, but is visible in only one-third to one-half of them at birth; if the defect is not too severe, the lesion heals and the mice survive
|
integument
belly spot
(
J:13464
)
• although the lens defect is the most consistent landmark, occasionally homozygotes have only a white belly spot
|