Mm

mallard

Mmd

mallard

mdmd

dusky

In general, the number of genotypes possible will be [n(n+1)]/2, where n equals the number of different alleles at a locus. Working crosses with multiple alleles is no different from working crosses with two alleles; Mendel's principle of segregation still holds, as shown in the cross between a restricted duck and a mallard duck ( FIGURE 5.4).

P generation

Restricted

MRm d

0 0

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