Suppose that a homeotic gene from Drosophila is introduced into an Arabidopsis e

Question

Suppose that a homeotic gene from Drosophila is introduced into an Arabidopsis embryo that has a pre-existing mutation in one of its homeotic flower genes. What effect would you expect and why?

a mixture of roughly equal numbers of Drosophila and plant gene product, producing an intermediate phenotype

expression of the Drosophila homeotic gene correcting the mRNA of the mutant plant

C)

D)

A)

a mixture of roughly equal numbers of Drosophila and plant gene product, producing an intermediate phenotype

B)

expression of the Drosophila homeotic gene correcting the mRNA of the mutant plant

C)

rescue (or negating) of the phenotype of the mutant because the fly Hox gene supplies the missing protein

D)

correction of the sequence in the mutant by recombination with the Drosophila gene sequence E) no effect, because Hox genes are different from MADS box genes

Explanation / Answer

Hox genes are responsible for body parts formation in drosophila, whereas MADS box genes are responsible for flower formation in Arabidopsis and they regulates the transcription of the floral genes. The MADS box is similar the Hox gene, but “Hox” genes are different from MADS box genes based on their regulation, so there is no effect.

Thus, the correct option is (E).

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