The F1 progeny showed a 1 : 1 phenotypic ratio for both the hair color and hair type traits. The supplied information is still insufficient to conclude which trait is dominant over the other. Thus, A cannot be correct at this point.
You do a cross between a white curly haired mouse and a black straight-haired mouse. You do not know if these animals come from true breeding populations. The 16 F1 progeny are 8 white curly mice and 8 black straight-haired mice. The following are consistent with this data.
A. Black is dominant.
B. One of the mice was heterozygous for both curly/straight and white/black hair.
C. Both curly/straight and white/black are present together on the same chromosome.
D. All of the answers listed above are correct.
E. None of the answers listed above are correct.