Like trisomy 21, mosaic Down syndrome is not inherited. It occurs as a random event during cell division early in fetal development. As a result, some of the body's cells have the usual two copies of chromosome 21, and other cells have three copies of this chromosome.
1 An average cost for a cubic yard of concrete is $75 to $125, depending on how much is needed and local prices. 2  Labor costs to pour and form concrete run somewhere around $3.50 to $7.00 per square foot.3  One homeowner paid $11,000 for a crawl space for a 1,500 square foot home. An average cost for a cubic yard of concrete is $75 to $125, depending on how much is needed and local prices. 2  Labor costs to pour and form concrete run somewhere around $3.50 to $7.00 per square foot.
Cost breakdown. 1  Materials: Poured slab concrete typically costs $3-$5 per square foot. Footings 1 can add an additional $1-$2 per square foot. 2  Labor: labor costs from contractors or concrete specialists typically adds another $2-$3 per square foot, for a total of $2000-$3000 for this project. On average, it takes three to four days from start to finish to dig out and pour the concrete. Enhancement and improvement costs. Pouring the foundation is a good time to add radiant flooring 2.