The 1860s Gregor Mendel performed numerous dihybrid crosses between pea plants. Dihybrid
crosses involve the study of the inheritance patterns related to two different traits. In guinea pigs
the allele for black fur (B) is dominant over the allele for brown fur (b), and the allele for short fur
(F) is dominant over the allele for long fur (f). What percentage of the offspring from a BbFf x bbff
cross would be expected to be heterozygous for both traits? B
F 0%
G 25%
H 50%
J 100%

The percentage of the offsprings from the cross that will be heterozygous for both trait is 25%

Explanation: A dibybrid cross between two guinea pigs of genotype BbFf and bbff will produce 16 offsprings. The genotype ratio of the offsprings is 4 BbFf : 4 Bbff: 4 bbFf : 4 bbff.

Only 4 BbFf offsprings are heterozygous for both trait therefore the percentage of the offsprings that are heterozygous for both trait is (4/16) x 100 = 25%

See the punnett square attached for details of the dibybrid cross

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.