If they have an offspring with short whiskers what is the genotype of their offspring?

The genotype of the offspring with short whiskers would depend on the genetic basis of whisker length, which may be influenced by dominant and recessive alleles. If short whiskers are a recessive trait, the offspring could be homozygous recessive (ss) or heterozygous (Ss) if one or both parents carry the dominant allele for long whiskers (S). If both parents are homozygous for short whiskers (ss), then all offspring will also have the genotype ss.