Piebald spotting is a condition found in humans in which there are patches of skin that lack pigmentation. the condition results from the inability of pigment- producing cells to migrate properly during development. two adults with piebald spotting have one child who has this trait and a second child with normal skin pigmentation. a. is the piebald spotting trait dominant or recessive? what information led you to this answer? b. what are the genotypes of the parents?

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

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?