Читать книгу Lifespan Development - Tara L. Kuther - Страница 115

Many disorders are the result of genes passed through inheritance from one or both parents. Others are the result of variations in chromosomes. Fortunately, the vast majority of people —and animals, for that matter—inherit healthy genes. Many hereditary and chromosomal abnormalities can be diagnosed prenatally. Others are evident at birth or can be detected soon after an infant begins to develop. Still others reveal themselves only over a period of many years.