Suppose two plant populations are able to exchange pollen and seeds. In one population, the individuals of genotype AA are the most common (9000 AA, 900 Aa, 100 aa), while the opposite is true in the other population (100AA. 900Aa, 9000 aa). If neither allele has a selective advantage, what will happen over time to the allele and genotype frequencies of these populations

Once an egg cell is fertilized by sperm, the cell then, as the embryo develops, it receives nourishment and eliminates wastes by transferring substances from its blood to its mother's blood. a. becomes a fetus immediately and exits the womb b. begins to divide and implants itself in the wall of the uterus c. remains in the uterus without dividing for several months d. travels back to the ovaries until the fetus is developed