Unformatted text preview: + Rh-. In B. The male in this case had to contribute I O , N, Rh neg alleles. The father could either be the male O MN Rh pos or B MN Rh pos. However, the latter is the only male fitting the requirements for the mother and child in A and therefore the father in B must be O MN Rh pos (since we specified only one child per male). B. Recessive Lethals 4. P = platinum p = normal P1 P/p x P/p F2 P/P (lethal!) 2 P/p p/p i.e. the 2:1 ratio indicates a recessive lethal 5. Females L/l x male L/Y where L = normal, l = lethal Y = Y chromosome L/L L/l L/Y l/Y (but this is lethal!) i.e. you predict a ratio of 2 girls: 1 boy...
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- Fall '07
- Genetics, Trigraph, MN Rh pos