K.C.S.E Biology Q & A - MODEL 2010PP2QN05
When pure breeding black guinea pigs were crossed with pure breeding white guinea pigs, the offspring had a coat with black and white patches.
(a) Using letter G to represent the gene for black coat colour and letter H for white coat colour, work out the genotypic ratio of F2.
(b) State the phenotypic ratio of F2.
(c) (i) Name the term used when two alleles in heterozygous state are fully expressed phenotypically in an organism.
(ii) Give an example of a trait in human beings where the condition whose term is named in (c) (i) above expresses itself.