Question
Having correctly established the $\mathrm{F}_{2}$ ratio in Problem $16,$ predict the $\mathrm{F}_{2}$ ratio of a "dihybrid" cross involving two independently assorting characteristics (e.g., $P_{1}=W W W W A A A A \times$ wwwwaaaa).
Step 1
For the first characteristic (W), we have a monohybrid cross between WW and ww. From Problem 16, we know that the F2 ratio for a monohybrid cross is 3:1 (3 dominant to 1 recessive). So, for the W characteristic, the F2 ratio will be 3W:1w. Similarly, for the Show more…
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Having correctly established the $mathrm{F}_{2}$ ratio in Problem 18 , predict the $mathrm{F}_{2}$ ratio of a "dihybrid" cross involving two independently assorting characteristics (e.g., $mathrm{P}_{1}=W W W W A A A A imes$ wwwwaaaa).
In Mendelian dihybrid cross, how many individuals are heterozygous of both the character in $\mathrm{F}_{2}$ -generation? (a) $\frac{1}{16}$ (b) $\frac{2}{16}$ (c) $\frac{3}{16}$ (d) $\frac{4}{16}$
Pure homozygous offsprings in a dihybrid cross in the $\mathrm{F}_{2}$ generation will be (a) $\frac{1}{2}$ (b) $\frac{1}{4}$ (c) $\frac{1}{8}$ (d) $\frac{1}{16}$
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