In Drosophila XO is a sterile female.

Drone is a fertile female.

Fill in the blanks with correct answer(s)/Give the answer in one word only. Name the flies (in Drosophila) in which a part of the body exhibits female characters.

Sex determination in Drosophila melanogaster is based on---

Sex - determination in Drosophila melanogaster is based on ----

Why grasshopper and Drosophila show male heterogamety? Explain.

Drosophila is commonly called _____.

_________ is the surgical cutting of follopian tubes of the female.

In a dihybrid cross, white-eyed, yellow -bodied female Drosophila was crossed with red-eyed, brown - bodied male Drosophila, produced in F_(2) - generation are 1.3% recombinants and 98.7% progeny with parental type combinations. This observation of Morgan deviated from Mendelian F_(2) - phenotypic dihybrid ratio. Explain giving reasons, Morgan's observations