Lucci_Prelab10_Monday2pm

7 what is a punnet square a punnett square is a four

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7. What is a Punnet square? A Punnett square is a four-square diagram for showing the probabilities of an offspring to inherit a certain pair of alleles from it’s parents. 8. What allele(s) do the gametes contain? Both male and female parts of the plant have G c g c 9. Give the genotype and phenotype ratios in a monohybrid cross for i) complete dominance: 1 G c G c : 2 G c g c : 1 g c g c 3 green : 1 albino ii) incomplete dominance: 1 G c G c : 2 G c g c : 1 g c g c 1 green : 2 yellow-green : 1 albino Exercise 10.2: 10. What is the objective of this exercise? Observe & analyze crosses of mutant genes for purple vs. yellow pigment of the aleurone layer and smooth vs. wrinkled seed texture. 11. Fill in the Punnet square for F 1 (First filial) generation of the dihybrid cross: Purple-smooth (PPSS) x yellow-wrinkled (ppss) PS PS ps PpSs PpSs ps PpSs PpSs What do you notice about the offsprings of the cross (the filled in portion)? They all have the same genotype. 12. Fill in the Punnet square for the F 2 (Second Generation) obtained by crossing two F 1 of the dihybrid cross (the first one is filled in for you). Purple-smooth (PpSs) x Purple-smooth (PpSs) PS Ps pS ps PS PPSS PPSs PpSS PpSs Ps PPSs PPss PpSs Ppss pS PpSS PpSs ppSS ppSs ps PpSs Ppss ppSs ppss List the four phenotypes that this gives and their ratio!
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