I think A. It’s the only one that’s really makes since for this question.
Answer:
O blood is a recessive trait, so none of the children will have O blood. The genes for either type A or Type B will be determined by the egg/sperm being fertilized with the reproductive cell of the other parent. the probability of receiving either of the gene versions is 1/2, so half of the children will have A blood and the other half will have B blood
A, because it the constant variable
Four egg cells are produced in meiosis but only one will actually be used.
