The punnett square refers to the grid structure that is used to predict the outcome of a genetic cross. It was first developed by Reginald Punnett and hence named so. For the purpose, the types of gametes and their respective frequencies from a parent are written across the top. The gametes and their frequencies from the other parent are written on the left side of the grid. The squares are then filled in with the resulting combinations of gametes from the two parents. In this way, a punnett square allows direct calculation of the probabilities of occurrence of all possible offspring of a genetic cross.
When fat (cholestrol) is accumulated in coronary artery it stops the supply of blood to the heart which results in heart attack (myocardial infarction).
Decreasing the intake of cholestrol decreases the risks of myocardial infarction
