Student teams analyze genetic test results for fictional characters, compare their characters' risks of developing specific diseases, and assess the risks for the next generation. Can genetic testing ...

A: Genes work in pairs. Every person inherits two copies of most genes, one from each parent. Some gene variants, called dominant alleles, express themselves even when only one copy is present. Others ...

In general, humans have the same genes. A number of genes are varied. These control our physical traits and health. Each variation is called an allele. You inherit two alleles for each gene. One comes ...