Polydactyly (extra digits) is a dominant trait caused by gene P, as opposed to the normal allele p. Cystic fibrosis, f, is a recessive disease, as opposed to the normal condition, F. A polydactylous woman, otherwise normal in phenotype, has kids with a healthy normal man. Their 4 children have the following phenotypes:

Child 1 is phenotypically normal in all respects
Child 2 is polydactylous, otherwise phenotypically normal
Child 3 has cystic fibrosis, otherwise phenotypically normal
Child 4 has cystic fibrosis and is polydactylous

What is the probability that their 5th child will have cystic fibrosis and be polydactylous?

a. 1/4 (0.25)
b. 1/2 (0.5)
c. 1/8 (0.125)
d. 3/8 (0.375)
e. 3/4 (0.75)

Sally and sue were investigating the topic of friction in science. they used a small car and a ramp as seen in the picture to test what they were learning. they knew that they slipped easily on waxed floors but not on carpet, so they decided to change the material on the surface of the ramp to see what happened. they planned to use glass, carpet, aluminum foil, and sandpaper and run the car down the ramp over each surface. what would be the best research question to guide the girls' experiment? a) does the amount of surface area affect the friction on the moving car? b) will the car travel fastest on the glass surface? c) how does the angle of the ramp affect the speed of the car? d)do rougher surfaces tend to create more friction than smooth surfaces?

What conclusion can be made based on the temperature of soil when the light hits the soil at 0°, 45°, and 90° angles in section 2 of the experiment? did your results support your hypothesis? why or why not?

What is the best conclusion based on this data? the hypothesis was not supported because the data indicated that fertilizing plants does not improve plant growth. the hypothesis was supported; to get the best growth, use 5 milliliters of fertilizer per plant. the hypothesis was not supported; the data indicated that too much fertilizer can inhibit plant growth. the hypothesis was supported; to get the best growth, use 15 milliliters of fertilizer per plant.