In guinea pigs, the allele for short hair is dominant. What genotype would a heterozygous short haired guinea pig have? What genotype would a pure breeding short haired guinea pig have? What genotype would a long haired guinea pig have? Workout the cross for two heterozygous guinea pigs. What percentage of the offspring will have short hair? What percentage of the offspring will have long hair

Dear student,
Let the allele for short hair be H and allele for long hair is h

Genotype for a heterozygous short haired guinea pig is Hh

Genotype for pure breeding short haired guinea pig is HH

Genotype of long haired guinea pig is hh


Parent generation for Heterozygous guinea pig is HhTwo gametes are formed they are H and hwhen two pig with same genotype are crossed the offsprings have following genotype
Gametes H h
H HH Hh
h Hh hh


Hence there are 3 pigs with short hair and 1 pig with long hair 
proportion of short haired pigs is 75% and long haired pigs is 25%.

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