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

Explanation / Answer

The correct answer is Female-specific splicing of tra will not occur, resulting in male characteristics.

Sex-lethal is the master gene for somtic sex determination. in Drosophila melanogaster. In XX animals this gene imposes femaleness in them, and in XY animals it remains inactive and it develops into a male. The differential expression of sex lethal genes is an example of transcriptional and translational control. If the sex lethal gene is deleted in them the female-specific splicing of tra will not occur, resulting in male characteristics.

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