What will be the effect on sexual development in newly fertilized Drosophila emb

Question

What will be the effect on sexual development in newly fertilized Drosophila embryos if the transformer gene is deleted? No normal embryo will develop as it will lead to embryonic lethality. Female-specific splicing of Dsx will not occur, resulting in intersex flies. Male-specific splicing of dsx will not occur, resulting in female characteristics. Male-specific splicing of Dsx will still occur, resulting in male characteristics. Male-specific splicing of Dsx will not occur, resulting in intersex flies. What will be the effect on sexual development in newly fertilized Drosophila embryos if the transformer gene is deleted? No normal embryo will develop as it will lead to embryonic lethality. Female-specific splicing of Dsx will not occur, resulting in intersex flies. Male-specific splicing of dsx will not occur, resulting in female characteristics. Male-specific splicing of Dsx will still occur, resulting in male characteristics. Male-specific splicing of Dsx will not occur, resulting in intersex flies.

Explanation / Answer

Answer:

Male-specific splicing of Dsx will still occur, resulting in male characteristics.

Note:

Tra protein in association with the Tra2 protein is needed for female specific splicing of the double-sex (Dsx) pre-mRNA. The female-specific Dsx protein is needed for the development of certain female characteristics. A male specific Dsx protein is needed for the development of certain male characteristics.

If the tra gene is absent, then a male-specific Dsx protein is synthesized allowing for the development of male specific characteristics.

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