Heterozygous parents would have the genotype Rr. In a punnett square, this would show a result of 25% homozygous dominant (RR) offspring, 25% homozygous recessive (rr) offspring, and 50% heterozygous (Rr) offspring. (I attempted to simulate a punnett square with the text)
The red flower is dominant "R" to white flower color "r" in red roses. We are asked of what is the expected result of a cross between the two heterozygous rose plants and the answer is "75 % for the red, 25% for the white flower. "
You can automatically eliminate B and D because they have little to do with the movement of the body. And it's not A because the skeletal system doesn't have the signals to tell the muscular system what to do.
