Table 1 The ratio of homozygous to heterozygous sons, or of alternate paternal alleles in daughters, at a series of Z-linked loci (ordered according to their relative positions on the chromosome) in a sample of adult offspring produced by five daughter–father backcrosses.

From: Recessive Z-linked lethals and the retention of haplotype diversity in a captive butterfly population

 

Sons (homozygotes : heterozygotes)

Daughters (allele 1 : allele 2)

 

2BF1

8BF1

9BF1

11BF1

13BF1

2BF1

8BF1

9BF1

11BF1

13BF1

loci

(n = 24)

(n = 33)

(n = 29)

(n = 24)

(n = 20)

(n = 16)

(n = 16)

(n = 16)

(n = 16)

(n = 14)

C2745

9:15

17:16

11:18

6:18

10:10

3:13

8:8

8:8

8:8

8:6

Kettin

9:15

4:12

Tpi

13:20

6:23*

20:0***

6:10

6:10

14:0***

Cyp303a1

3:21*

1:23***

4:12

11:5

C5197

0:29***

0:24***

0:20***

5:11

9:7

4:10

Masc

0:24***

0:33***

0:29***

0:24***

2:18*

6:10

7:9

5:11

10:6

3:11

6PGD

1:23***

0:33***

8:8

7:9

Ldh

4:20*

2:31***

2:27***

18:6

3:17*

7:9

6:10

6:10

5:11

4:10

Henna

2:31***

1:28***

6:10

5:11

  1. Bold highlights the region in which homozygous sons are almost entirely missing. The significance of deviations from the null expectation of 1:1 (homozygotes vs. heterozygotes or allele 1 vs. allele 2) is indicated by asterisks (Fisher’s exact test).