What cross will result in a ratio of 3 dominant phenotype offspring for every 1 recessive offspring?

Leila has dimples because she received a gene copy from her father that coded for dimples. this means that dimples are an example of a trait that is

Identify the missing parts of the carbon cycle

Amniocentesis is a process in which amniotic fluid is taken from the mother's womb to identify any genetic abnormalities in the fetus. how would the discovery of the human genome contribute to this process?