Table 1

Genotypes arising from matings between AaBb persons when only two alleles occur (Aa, Bb) at two independently segregating loci*

	Ovum
		AB	aB	Ab	ab
The 12 italicised* genotypes contain at least 1 “a” allele but no “b” alleles. The nine italicised and underlined alleles contain at least 1 “a” and “1 “b” allele.
	AB	ABAB	ABaB	ABAb	ABab
	aB	aBAB	aBaB	aBAb	aBab
	Ab	AbAB	AbaB	AbAb	Abab
Sperm	ab	abAB	abaB	abAb	abab