Freckles are small, spots of a skin pigment called melanin. most fair-skinned, red-haired people have them. freckles are controlled primarily by the mc1r gene. freckles are a dominant trait: parents who have freckles tend to have children with freckles. bill and barb both have freckles. yet of their four children, one child does not have freckles! what must be the genotypes of bill and barb? a) bb and bb b) bb and bb c) bb and bb d) bb and bb

Which of the following scenarios is an example of the bottleneck effect? answers a in south africa, much of the afrikaner population is descended from a small number of dutch colonists. in this population, this is an unusually high frequency of pseudoxanthoma elasticum (pxe), an elastic tissue disorder. b four white-tailed deer are introduced to a park in finland. thirty years after their introduction scientists compare the genes in the population and find that there is no variation. c during the industrial revolution, london's air became filled with soot. as a result, birds started eating more of the lighter moths because they were easier to spot than their darker counterparts. over time, the moth population changed so that there were more darker moths than lighter ones. d 10% of the population of american alligators in an area have the recessive trait albinism. a massive flood results in the death of 80% of the population. of the remaining population, 60% have the recessive trait of albinism.

Glucose is a form of sugar found in the blood cells use glucose as a source of energy, but too much or too little can cause serious health issues so, the body uses the hormone insulin to regulate glucose n the blood insulin maintain glucose levels in the blood if blood glucose lovels got very high, what would you expect to see happen to insulin levels?

How many years would it take the atlantic ocean to grow 500 centimeters? show your work.