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| Dwarfism
At least three types in cattle:
snorter dwarfism: most common; short, blocky appearance; deformed bone growth in nasal passages causing difficult breathing;
long head dwarfism: small size but normal nasal passages;
compress dwarfism: extremely compressed body conformation with one compress allele and one normal gene; dwarf and death at or soon after birth with two compress alleles
Simple recessive (snorter dwarfism; long head dwarfism); incomplete dominance (compress dwarfism); environmental causes
Angus, Hereford, Brahman, Dexter | |
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