Cystic fibrosis is a recessive gene disorder. The pedigree chart for a family known to have cystic fibrosis is shown below. What percentage of the offspring either are carriers or have observable disease?

25%
50%
75%
100%

When half of the shape is black it means the person is a carrier. When the whole shape is black this means the person has the disorder.

d.100%

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.

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explanation:

bc blah