In sheep, the formation of horns is a sex-influenced trait, where the horns (h) allele is dominant in males but recessive in

Question

In sheep, the formation of horns is a sex-influenced trait, where the horns (h) allele is dominant in males but recessive in females. Females must be homozygous to grow horns. A horned male ram was crossed to an un-horned female sheep, and produced a horned female. What is the genotype of both parents? 
O Both parents were heterozygous 
O Father was either heterozygous or homozygous for the horned allele and the mother was heterozygous 
O Both parents were either heterozygous or homozygous for the horned allele 
O Father was either heterozygous or homozygous for the horned allele and the mother was homozygous for the horned allele 
O Father was homozygous for the horned allele and the mother was either heterozygous or homozygous for the horned allele

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