BIOL 1090 Lecture Notes - Lecture 5: Punnett Square, Dd National, Zygosity
25 Oct 2016
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Document Summary
Mendel"s principles (cid:523)dominance, segregation, independent assortment) can be used to predict assortment) can be used to predict the outcomes of crosses between different strands of organisms. The dominant and recessive alleles for 3 genes encoding plant height, seed colour and see texture in peas are: plant height- d= tall d= dwarf, seed colour- g= yellow g= green, seed texture- w=round w=wrinkled. F1 individuals that are heterozygous at all three loci are crossed. Dd gg ww x dd gg ww. Since the genes have dominant and recessive alleles and assort independently, the problem breaks down to 3 monohybrid crosses as shown in the punnett squares to the right. Consequently, the genotypes for tall, green and wrinkled that we are interested in would be; dd gg ww and dd gg ww. What methods are available to us for determining the genotypes and proportions of individuals arising from the cross; dd gg ww x dd gg ww.
