Answer:
The punnet square is attached as an image.
The expected offsprings have the genotypes GgBb, Ggbb, ggBb and ggbb in the ratio 1:1:1:1 i.e. 4/16 or 1/4 of each offspring will be produced.
Step-by-step explanation:
This a cross involving two genes in rabbits. Gene 1 has two alleles; G and g while the alleles of Gene 2 are B and b.
In a cross between a male rabbit with heterozygous genotype: GgBb and a female rabbit with homozygous genotype: ggbb, each allele will segregate independently of one another into gametes according to Mendel's law of independent assortment. Hence, each parent will produce gametes with the following possible allelic combinations:
GgBb - GB, Gb, gB, gb
ggbb - gb, gb, gb, gb
Using a punnet square (see attached image), 16 possible offsprings will be produced with only four different genotypes: GgBb, Ggbb, ggBb and ggbb in the genotypic ratio 1:1:1:1.
This means that 1/4 of each offsprings' genotype is expected.