Sickle Cell Anemia is a genetic disease (1 base pair mutation that changed a protein). It is common in those of African ancestry. S will represent the normal dominant allele and s for the recessive sickle allele. They are co‐dominant alleles. SS is normal, Ss is not fatal, ss is debilitating, painful and often fatal. Given enough generations, would you expect one of these alleles to completely disappear from the population? Why or why not? ​

Are salt and soap nutrients or toxins for yeast? explain.

What causes temperature extremes in the desert

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. an incomplete dominance cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. purple offspring result. then, two of the purple offspring are crossed. according to the punnett square for this cross, how many of the offspring from the second cross will have a feather color that results from incomplete dominance? 1 in 4 2 in 4 3 in 4 4 in 4