I What are the different stages of Drosophila development? A Egg larval, pupal,
ID: 302662 • Letter: I
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I What are the different stages of Drosophila development? A Egg larval, pupal, adult B. Egg, cocoon, fetus, adult C Egg adult, neonate, adult D. All of the above Which of the following is a feature of larval stage? A use black mouth hooks to eat B. Eggs are oval shaped, and have two 2. filaments at one end C D. Have a head, thorax, abdomen, six legs Live a month or so and then die 3. Which of the following is/are the reason for using Drosophila in experiments? A. Short life cycle B. Inexpensive C. D. Clear genetic background All of the above Drosophila melanogaster is used to study the following biological process; 4. A. Embryonic development ?.? C. Bone marrow disorder D. All of the above diseases 5. Alternating dark and light bands can be seen on the entire rear portion of the A. Fetal pig B. C. D. Experimental frog Female Drosophila melanogaster Cray fish What is the entire time period of complete "life cycle" for Drosophila? A. 1 day B. 10 days C. 100 days 6. D. 1000 days 7. Which of the following is the list of characteristics used to distinguish male and female drosophila? A. B. C. D. Size, shape, color Dimorphism Chromosomal abundance None of the aboveExplanation / Answer
Answer:A – Egg, larval, pupal, adult
The time required for an egg to mature into an adult varies depending upon the temperature. At room temperature, it requires around 7-9 days, however, at higher temperature due to heat stress the developmental time is more. A female usually lays around 350-400 eggs,which under favorable condition will hatch into larvae. There are 3 stages (1st , 2nd, and 3rd, instar larva) of larval development and it takes around 4 days. This is the time when they feed on the microorganism on the substrate that they are growing on. After day 4, the larvae will pupate. At this stage wings and legs develop. This is called metamorphosis, which last for 4 days and finally the adult fly emerges.
2.Which of the following is the feature of larval stage
Answer:A – Use black mouth hook to eat
Ventral surface of larva has rows of hook that helps them to grip a substrate and feed
3.Which of the following are the reasons for using drosophila in experiments
Answer:D -all of the above
It has a short and simple life cycle of about 14 days and thus helps in studying many generation in short period of time. Their maintenance in lab is not very expensive. Its genome is completely sequenced.
4.Drosophila melanogaster is used to study the following biological precess
Answer: A – Embryonic development
Drosophila’s embryo is similar to that of human to certain extent and it is easy to control the gene expression at embryonic stage, which helps in studying various gene
5. Alternating dark and light bands can be seen on the entire rear portion of
Answer:C – Female Drosophila melanogaster
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