Describe how the availability of these genetic tests might affect the frequency of genetic diseases in individuals and populations

Genetic screening can curb a lot of genetic defects in a population.  

A genetic defect in an individual starts from the time the person is in mother’s womb. So, these diseases can be curbed if the person goes through a genetic screening during this time. Any genetic defected womb can be abhorred and thus how we can decrease the number of this disease.

A person with Down’s syndrome doesn’t survive for long, or doesn’t lead a healthy life. So aborting these child isn’t actually bad. Thus we can delete the chances of these babies by means of genetic screening by means of amniocentesis.  

the farther away the object is from the central star (the sun) it's gravitainal pull on the object is weaker when it is farther

explanation: