Astudent is investigating the affect of different salts on melting points. four patches of ice of equal size are roped off and a different type of salt is
poured on each, one receives table salt (nacl), one receives calcium chloride (cacl2), one receives potassium carbonate (kco3) and the fourth
receives inert sand instead. each patch receives an equal amount of salt or sand. the student measures the volume of ice remaining and subtracts
it from the original volume of ice to see how much melted away. what is the dependent variable?
• o a. the ice that received sand.
. b. the amount of ice that melted.
• c. the size of the ice patches.
• d. the type of salt applied to the ice.

Thats bot a question

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The answer would be c, white eyes are homozygous recessive. in the early 1900s, morgan conducted several experiments with vinegar  flies (drosophila). one  sample revealed an anomaly: a  white-eyed, single male fly. he attempted to breed this fly with the typical red-eyed females. the offspring were all red-eyed. using flies from this new generation (brother-sister pairs)  produced some red-eyed and a few white-eyed flies. the white-eyed were all male. in later experiments, he was able to produce white-eyed females. this proved that white eyes are not lethal to either sex (ruling out a and b). since the percentage of white eyes to red eyes is so low, white eyes are not a dominant trait. it would be a recessive trait.