If a woman with type A blood and a man with type O blood have children and all of those have type A blood , what are the genotypes of both of the parents?

What environmental cues and landmarks do the geese use to determine the timing and direction of their migration over the mountains? how do they find their way?

In a population that is in hardy-weinberg equilibrium, there are two possible alleles for a certain gene, a and a. if the frequency of allele a is 0.4, what fraction of the population is heterozygous? a. 0.40 b. 0.60 c. 0.16 d. 0.48

The disease osteoporosis often results from insufficient intake of dietary calcium salts. of the three samples of bone you tested in exercise 7-2, which is the most similar to the bones in osteoporosis