In mammoths, assume that spotted skin (S) is dominant over non-spotted skin (s) and that wooly hair (W) is dominant over non-wooly hair (w). Cross a mating between a heterozygous spotted, non-wooly mammoth with a heterozygous wooly-haired, non-spotted mammoth. Give genotypic and phenotypic ratios of offspring.

25% of the progeny is expected to be SsWw, exhibiting spotted skin and wooly hair, SsWw
25% of the progeny is expected to be Ssww, exhibiting spotted skin and non-wooly hair, Ssww
25% of the progeny is expected to be ssWw, exhibiting non- spotted skin and wooly hair, ssWw
25% of the progeny is expected to be ssww, exhibiting non-spotted skin and non-wooly hair, ssww

Explanation:

Available data:

spotted skin (S) is dominant over non-spotted skin (s)
wooly hair (W) is dominant over non-wooly hair (w)
Cross: heterozygous spotted, non-wooly mammoth with a heterozygous wooly-haired, non-spotted mammoth.

Parentals) Ssww x ssWw

Gametes) Sw, Sw, sw, sw

sW, sW, sw, sw

Punnett square) Sw Sw sw sw

sW SsWw SsWw ssWw ssWw

sw Ssww Ssww ssww ssww

F1) 4/16 = 1/4 = 25% of the progeny is expected to be SsWw, exhibiting spotted skin and wooly hair

4/16 = 1/4 = 25% of the progeny is expected to be Ssww, exhibiting spotted skin and non-wooly hair

4/16 = 1/4 = 25% of the progeny is expected to be ssWw, exhibiting non- spotted skin and wooly hair

4/16 = 1/4 = 25% of the progeny is expected to be ssww, exhibiting non-spotted skin and non-wooly hair.

Genotypic and Phenotypic ratios → 1:1:1:1