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All of the following statements are part of the Darwin-Wallace theory of Natural Selection EXCEPT:

Evolution is principally a process of

The most important effect of independent assortment is

Determine the genotype of the parents in the following crosses.  Use correct symbols and show your work. a)    One parent is group A blood type, the other group B, but all 4 groups are represented in their children. b)    A normal colour vision female marries a normal colour vision male.  Their first son is colour blind.  Colour-blindness is a sex-linked disorder. c)    A brown-eyed, right-handed male marries a blue-eyed, right-handed woman (brown eyes and right-handedness are dominant).  Their first child is blue-eyed and left handed.

When C. Darwin left for the Galapagos Islands, he believed in the immutability of species (they don’t change).

What percentage of the children born to parents both of whom suffer from phenylketonuria (PKU) will develop this disease? PKU is an autosomal recessive disease. 

Individuals with the same phenotype

In the cell DNA is found as chromatin when the cell is not dividing

Heartburn is when stomach acid moves into the duodenum.

Certain diseases severely damage organs so much so that they must be removed.     Answer the following in detail.     a)  Why might a patient with pancreatic cancer, which drastically interferes with the pancreatic secretions, suffer from a duodenal ulcer? (3 marks)