In which generation is a recessive deleterious allele MOST l

   In which generation is a recessive deleterious allele MOST likely to negatively affect the fitness of the individual expressing it?
   
   gametophyte
   equally likely in both sporophyte and gametophyte
   highly improbable in both generations
   sporophyte

Solution

The gametophyte are gamete producing phase which are haploid in nature while sporophytes are spore forming an ddiploid in nature. The haploid games when fuse form zygote and then this forms spores. When we consider recessive alleles, they are expressed only when there is no dominant allele in their zygote because gametes produced will only have one copy of chromosome either dominant or recessive. The fusion of one dominant and one recessive will give a zygote, diploid, and recessive allele won\'t be expressed. Therefore, if gametophyte is equally likely in both sporophyte, the negative affect of recessive allele on the fitness of individual expressing it is more.