Mexican hairless dogs are heterozygous (Hh), carrying a single copy of a recessive lethal allele (hh homozygotes are dead, and HH individuals have hair). In a given population, 60% of the individuals are HH and 40% are Hh. What are the allele frequencies in this population?
a)0.80 H and 0.20 h
b)0.50 H and 0.50 h
c)0.60 H and 0.40 h
d)0.20 H and 0.80 h
e)0.77 H and 0.23 h