I would say that they came to: our <span>estimate is that about three-quarters of the current annual incidence of breast-cancer in the United States is being caused by earlier ionizing radiation, primarily from medical sources. We will show that the recently growing incidence is not mysterious, and that if we wish to understand why the incidence has been growing, we must look to radiation events in the life of women 15-25-35-45 and more years before breast-cancer diagnosis. Moreover, there is recent evidence about induction of </span>early<span>-onset breast-cancer by radiation. there, i hope that this helps you. have a great day. =)</span>
A sperm and an egg each contain one set of 23 chromosomes. When the sperm fertilizes the egg, two copies of each chromosome are present (and therefore two copies of each gene), and so an embryo forms.
