Part II: Follow the instructions in the Question column to complete the virtual lab scenarios and record your data:
Complete all ten scenarios and record your results in Table 1.
When you record a ratio, whether it is genotypic or phenotypic ratio, always record the most dominant characteristic first, followed by the recessive. For example, when recording genotypic ratios:
1) If your offspring genotypes include 1 GG, 2 Gg, and 1 gg, the ratio would be: 1 GG : 2 Gg : 1 gg
2) If your offspring genotypes include 2 GG and 2 Gg, the ratio would be: 2 GG : 2 gg (or 1:1 in the reduced form)
3) If your offspring genotypes are 4 gg, then the ratio would be written as:: 4 gg
When you record phenotypic ratios for a monohybrid cross, there are only two possible phenotypes - either the dominant phenotype or the recessive phenotype. So you do not need to indicate the phenotype, simply put the dominant # first, followed by the recessive #:
4) If your offspring phenotypes are 3 dominant and 1 recessive, the ratio is: 3:1
5) If your offspring phenotypes are 4 dominant and 0 recessive, the ratio is: 4:0
6) If your offspring phenotypes are 0 dominant and 4 recessive, the ratio is: 0:4
Table 1
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10