Amale rabbit with genotype ggbb x with a female rabbit with genotype ggbb. show the punnett square and the excepted offspring and their portions.

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.

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.

See attachment below

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