1.) In a plant species, purple flowers (P) are dominant to white flowers (p). Two heterozygotes for flower color are crossed to produce offspring. What fraction off offspring will have purple flowers?
2.) In flies, the allele for brown bodies (B) is dominant to yellow bodies (b). Two flies with brown bodies (Bb) are mated to produce offspring. What will be the ratio of brown to yellow bodies? What fraction of the offspring will have brown bodies?
3.) In a species of a bird, short beaks (l) are recessive to long beaks (L). A bird that is a heterozygous for beak length is crossed with a short beaked bird. What percentage of offspring will have long beaks? What will be the ratio of phenotypes in the offspring?
4.) in a certain plant, white flowers (p) are recessive to purple flowers (P). A plant with purple flowers (Pp) is crossed with a plant with white flowers. What percentage of offspring will have purple flowers? What will be the ratio of genotypes in the offspring? What fraction of the offspring will have white flowers?