Parents that are heterozygous for having freckles (dominant) are crossed. which represents the ratio of their offspring?
a) twenty-five percent have freckles.
b) twenty-five percent are ff.
c) seventy-five percent have freckles.
d) seventy-five percent are ff.

In a classic experiment using pea shape, mendel conducted two separate genetic crosses. in the first cross the parent plants were “true breeding” for pea shape; one had round peas ( r )and the other had wrinkled (r). the first cross produced a filial 1 generation of all round peas. in the second cross, mendel bred plants from the filial 1 generation. this cross produced different results. out of approximately 1000 plants, about 75% were round and 25% were wrinkled.

The response is the basis for vaccination. primary secondary tertiary none of the above

What advantages does a pedigree have over a written passage?