Kiểu gen nhân/ Kiểu gen TBC/ Kiểu hình:- rf rf / S bất dục / Phấn hư- rf rf / N hữu dục / Phấn tốt- Rf Rf hoặc Rf rf / N hữu dục / Phấn tốt- Rf Rf hoặc Rf rf / S bất dục / Phấn tốtA, B, C, D là những dòng thuầnBắp lai đơn có công thức: AxB và CxDBắp lai kép có công thức: (AxB) x (CxD)Kiểu gen của bắp lai đơn và lai kép như thế nào để khi sản xuất hạt giống khỏi phải khử đực và khi trồng sản xuất khỏi phải bổ sung phấn

What happens during interphase? (1)the nucleus grows to its full size. (2)the cell grows to its full size. (3)the nucleus divides into two nuclei. (4)the cell divides into two cells.

The frequency of alleles in a population that is in hardy weinberg equilibrium? a . changes in each successive generation b. is less important than the frequency genotypes c. shows evidence of the process of natural selection d. remains the same over several generations

The image shows the evolution of a species of fish. a few fish from a population developed different social behaviors and evolved into different species. two fish according to the image, the fish underwent . the new species of fish had mating seasons that were different from that of the original fish. because of the differences in mating seasons, the fish underwent reproductive isolation. this mode of isolation would be .