Table 18-3: Number of Homozygous Recessives per 10,000 Individuals for Different Allele      Frequencies (q)

Mating

F

q = 0.01

q = 0.005

q = 0.001

Unrelated parents

0.0

  1.00

  0.25

0.01

Parent-offspring or brother-sister

1/4

25.75

12.69

2.51

Half-sib

1/8

13.38

  6.47

1.26

First cousin

1/16

  7.19

  3.36

0.63

Second cousin

1/64

  2.55

  1.03

0.17