Approximately 20 percent of the world's adult population are able to digest milk sugar (lactose). they are "lactose tolerant." this trait is known to be controlled by a single dominant gene. therefore we would expect that :

a) all children of lactose parents will also be lactose tolerant.
b) no lactose tolerant individuals will be heterozygous for the gene
c) 60 percent of lactose intolerant individuals would be heterozygous.
d) ll lactose tolerant individuals to be heterozygous for the gene.

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?

Albinism is an autosomal recessive condition. which circle graph above shows the genotype probability when an albino female mates with a male that is heterozygous for the albinism trait? answer choice f answer choice g answer choice h answer choice j

Adistinctive characteristic of mammals that is not observed in other vertebrates is