Vasa gene, Biology

Vasa are a maternal-effect gene whose product functions in development of the posterior end of the Drosophila embryo.  runt is a non-maternal-effect gene whose product functions in the formation of a normal segmentation pattern in Drosophila embryos.  Mutations in vasa and runt lead to embryonic lethality.

Several mother/embryo genotypes are listed below.  Next to each, indicate whether the embryo would have a wild-type appearance or would display the mutant phenotype (a defective posterior end or defective segmentation pattern).  Some of the embryo/mother combinations would not be expected - write not expected next to those, Wild-type or mutant or not expected?  

vasa:  vas/+ embryo from vas/+ mother      

vas/vas embryo from vas/+ mother      

+/+ embryo from vas/+ mother

vas/+ embryo from vas/vas mother      

vas/vas embryo from vas/vas mother     

+/+ embryo from vas/vas mother        

runt:  rnt/+ embryo from rnt/+ mother      

rnt/rnt embryo from rnt/+ mother      

+/+ embryo from rnt/+ mother        

rnt/+ embryo from rnt/rnt mother      

rnt/rnt embryo from rnt/rnt mother      

+/+ embryo from rnt/rnt mother

Posted Date: 2/27/2013 6:16:54 AM | Location : United States

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