Dihybrid Cross -Genetics problems
NOTE: PLEASE PROVIDE BOTH PHENOTYPIC AND GENOTYPIC
RATIOS
1. In Geese, long necks are dominant to shor:t necks (L > l) AND
Webbed feet are dominant to Non-webbed feet (H > h)
a. Cross a long neck (homozygous), webbed feet (homozygous)
goose with a short neck, non-webbed feet goose
b. cross a long neck (heterozygous), non-webbed feet goose with a
short neck, webbed feet (heterozygous) goose
2. In groundhogs,
Big teeth are dominant to small teeth (B
Greeih eyes are dominant
> b) and
to brown eyes (G > g).
a. Cross a Big teeth (homozygous), green eyed (heterozygous)
groundhog with a small teeth, green eyed (homozygous)
groundhog
b. Cross 2 groundhogs that have big teeth and green eyes
(Heterozygous for both traits)- PHENOTYPE ONLY PLEASE!