Question

1. E is the gene for brown eye colour and e is the gene for blue eye colour. Which gene is (i) recessive, and (ii) dominant?
2. Both father and mother have the genes Ee in their cells. What colour are their eyes? 
3. Which combination of genes in the zygote will produce children with blue eyes? 
4. Which combinations of genes in the zygote will produce children with brown eyes? 

Answer 1

1. (i) Recessive: e (blue eye colour)
   (ii) Dominant: E (brown eye colour)
2. Both the father and the mother have brown eyes because E (brown) is dominant over e (blue).
3. ee
4. EE and Ee