In pigs the allele that produces a white belt around the body of the animal (R)
ID: 213549 • Letter: I
Question
In pigs the allele that produces a white belt around the body of the animal (R) is dominant to uniform body color (r). The dominant allele of another gene (F) produces the fusion of two hooves in each foot. Presume that a homozygous and homogeneous body pig for fused hooves is crossed with a normal hoof pig and heterozygous for the belt at the waist.
1-Determine the genotypes and the different gametes that the parents produce.
2-Determine the different phenotypes and genotypes produced in F1.
3-Determine the different phenotypes and genotypes of the heterozygous cross obtained in the F1 with the belt pig in the waist of the original cross.
Explanation / Answer
rrFF X ffRr
uniform body colour, fused hoov X white belt, normal hoov
rF
rF
fR
FfRr
Belt pig,fused hoove
FfRr
Belt pig, fused hooved
fr
Ffrr
Uniform, fused hoov
Ffrr
Uniform, fused hoov
FfRr X ffRr
FR
Fr
fR
fr
fR
FfRR
Belt pig, fused hoove
FfRr
Belt pig, fused hoove
ffRR
belt pig, normal foot
ffRr
belt pig, fused hoov
fr
FfRr
Belt pig, fused hoov
Ffrr
Belt pig, normal foot
ffRr
Belt pig, fused hoov
ffrr
Belt pig, normal foot
rF
rF
fR
FfRr
Belt pig,fused hoove
FfRr
Belt pig, fused hooved
fr
Ffrr
Uniform, fused hoov
Ffrr
Uniform, fused hoov