Both alleles are fully and simultaneously expressed in the heterozygote (e.g., AB blood type, or speckled chickens).
Download or print a high-quality PDF today. Set a timer for 30 minutes. Solve five problems cold. Then check your answers. Repeat tomorrow. Within two weeks, the language of heredity will feel as natural as reading your native tongue—because you will have done the work of solving, not just reading.
Practice is key to becoming proficient in solving genetics problems. Here are some resources: