How can you get rid of dwarfism in their herd

The rancher should do test crosses between normal sized cattle and dwarf cattle in order to identity which normal cattle are heterozygotes. Heterozygous cattle will produce 50% dwarf, 50% normal offspring while homozygous normal cattle will produce only normal offspring. By identifying the heterozygotes and then eliminating them from the herd (along with the dwarf cattle), the rancher will rid the herd of the allele causing dwarfism.

doctors i believe if i'm wrong sorry

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.