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The left side of primitive streak in early gastrula stage chick embryos was electroporated with cyan fluorescent

dye, while the right side of the primitive streak was electroporated with magenta fluorescent dye together with different Hox genes. Towards the end of gastrulation, the distribution of the fluoresecent signal was observed.  

From the distribution pattern below, what may be the effect of overexpressing these Hox genes (there may be multiple answers)?

a. Reduced delamination

b. Defective A-P patterning

c. Defective L-R patterning

d. Defective ingressionIMG_7701.jpg


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