Table 2. Observed percentages of males with phenotypic values in infertile F1 range vs. expected percentages under three alternative hypotheses for the minimum number of X–autosome incompatibilities required for an infertile phenotype.
| % (n) males with phenotypic values in infertile F1 range | ||||||
|---|---|---|---|---|---|---|
| Observed | Expected | |||||
| Generation (n) | RTWa | Sperm count | X–Ab | X–2Ac | X–3Ad | |
| N2 (17) | 0 (0) | 17.6 (3) | 50 (8.5) | 25 (4.3) | 6.3 (1.1) | |
| N3 (14) | 7.1 (1) | 14.3 (2) | 25 (3.5) | 6.3 (0.9) | 0.4 (0.6) | |
a
RTW, relative testis weight.
b
Infertility requires incompatibility between X and one autosomal dominant locus.
c
Infertility requires incompatibilities between X and two unlinked autosomal dominant loci with additive effects.
d
Infertility requires incompatibilities between X and three unlinked autosomal dominant loci with additive effects.