Homozygote cells are diploid or polyploid and have the same alleles in a locus (position) on homologous chromosomes[?].
... 1978 Oscar Peterson 1979 Hank Snow 1980 Paul Anka 1981 Joni Mitchell 1982 Neil Young 1983 Glenn Gould 1986 Gordon Lightfoot 1987 The Guess Who[?] 1989 ...