The F2 offspring produced and their numbers are recorded below?

F2 offspring and their numbers were 673 long-tailed, 712 tailless, and 1439 mid-length tail. From this information answer the following questions. Hint, examine F2 phenotypic ratios.





a. What is the mode of inheritance?





b. What are the genotypes and phenotypes of the P generation?





c. What are the genotypes and phenotypes of the F2 offspring?





d. If there is a biochemical explanation for this what is it?The F2 offspring produced and their numbers are recorded below?
a. What is the mode of inheritance? INCOMPLETE DOMINANCE





b. What are the genotypes and phenotypes of the P generation?





LL (long-tailed)


ll (tailless)





c. What are the genotypes and phenotypes of the F2 offspring?





LL (long-tailed)


Ll (intermediate; mid-length tail)


ll (tailless)





d. If there is a biochemical explanation for this what is it?





A biochemical which promotes tail growth is probably produced by the incompletely dominant L allele. Only individuals that are homozygous dominant produce enough of the biochemical to manifest a long-tailed phenotypic expression. Heterozygotes can only grow mid-length tails.

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