“Testing of two PRA affected animals within a 17th breed, the bull mastiff, revealed one heterozygote and one homozygous normal animal.”

“The individual tested was a heterozygote, necessarily possessing a copy of each allele.”

“When a carrier of a sex-linked trait expresses the phenotype, she is called a manifesting heterozygote.”

“It was 1913 before convincing cytological evidence for female heterozygosis was produced in moths.”

“The rate at which heterozygosity is lost depends on the extent to which chromosomes and chromatids segregate randomly during anaphase.”

“With overdominance, unlike alleles are postulated to result in a stimulating effect, so that genetic heterozygosity per se produces heterosis.”

“We found that bridled nailtail wallabies had one of the highest levels of heterozygosity and allelic diversity recorded for any marsupial.”

“In the case of heterozygotes, one allele was randomly selected for each individual.”

“Homozygotes and heterozygotes at individual sites were distinguished by their chromatographic patterns.”

“In translocation heterozygotes of maize, segregation produces nonviable gametes and can be detected by a high frequency of nonstaining pollen.”