Figure 4.—

Pairing frequencies for the histone cluster and dodeca satellite in ∼3-hr-old siRNA and piRNA/rasiRNA defective embryos. siRNA defective embryos were the progeny of homozygous mothers and fathers. Piwi¹ embryos were generated with the FLP-DFS technique (see text). Piwi¹ and mnk ^p6,aub^HN2/mnk ^p6,aub^QC42 embryos were the product of mutant females mated with w¹¹¹⁸ males. Each point indicates the pairing frequency of a single embryo in which the pairing state in at least 50 nuclei was determined. Error bars are standard errors for estimates of the pairing frequency.