Sex Determination

Amniocentesis is withdrawal of a sample of the fluid (amniotic fluid) surrounding a foetus in the uterus by piercing the amniotic sac through the abdominal wall, under direct ultrasound guidance. As the amniotic fluid contains cells from the foetus, cell cultures enable chromosome patterns to be studied so that prenatal diagnosis of chromosomal abnormalities can be made. Certain metabolic errors and other abnormalities, such as spina bifida, can also be diagnosed prenatally from analysis of the cells or of the fluid. As this technique also helps in detection of sex of the unborn foetus, it has been banned inorder to legally check increasing female foeticides.

The correct option is (A) :blocks estrogen receptors in the uterus, preventing eggs from getting implanted.

The correct option is (A) : Male fruit fly is heterogametic.