Answer:
1) Aa refers to the heterozygous of the genes. In this gene, both allele are different from one another.
2) AA is a gene which is homozygous in nature. Homozygous means that both allele are the same. Capital letters i. e. AA is used for the trait that is dominant.
3) aa is a gene which is homozygous in nature. Lower case letters i. e. aa is refer for the trait that is recessive.
So here we have two heterozygous organisms that will mate. You can put them into a Punnet square, just to be sure of your answers and to find all possible genotypes :
R r
R RR Rr
r Rr rr
So you have RR, Rr and rr as your possible genotypes.
A "beta-blocker" or clotbuster are the types of medication used to dissolve clots involved in MIs and CVAs. Remember though to be aware that two other medications that are used to prevent further clot build up are not clot busters but instead vasodilators (Nitroglycerin) or clotting antagonist (Aspirin).
Nearsightedness is the answer.
