MEDGAR EVERS COLLEGE-CUNY BIOLOGY DEPARTMENT BIOL-302 GENETICS LABORATORY TEST-I
ID: 302667 • Letter: M
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MEDGAR EVERS COLLEGE-CUNY BIOLOGY DEPARTMENT BIOL-302 GENETICS LABORATORY TEST-II SUMMER-II (JULY' 2018 (Total points: 40) Which of the following statement is true? A. A fruit y gencration could be produced in B. Thomas Hunt Morgan first generated the 8. solid evidence of genes associated with specific chromosome in the carly 1900s C. Morgan used red cye as the mutant allele Morgan's theory supported the law of D. . What are the different stages of Drosophila 9. Which is the location of Mendel's heritable AEgg, larval, pupal, adult Egg, cocoon, fetus, adult C. Egg, adult, neonate, adult D. All of the above C. Endoplasmic reticulum 2. Which of the following is a feature of larval 10. Traits alternative to the wild type is known as A use black mouth hooks to eat B Eggs are oval shaped, and have two filaments at one end C Have a head, thorax, abdomen, six legs D. C. Mutant phenotype D. Wild type Live a month or so and then die I1. Which two organisms are used for demonstrating classical Mendelian's law? A. Drosophila and maize B. Drosophila and peas C. Maize and peas D. Drosophila and polytene chromosomes 3. Which of the following is/are the reason for using Drosophila in experiments? A. Short life cycle D.All of the above Drosophila melanogaster is used to study the following biological process; 4. Which of the following is true for Drosophila? A. They are put to sleep by using chloroform B They are hatched at 25 degree Fahrenheit C They pass through a complete 12. B. C. D. Gastrointestinal diseases Bone marrow disorder All of the above D. They can grow without nutrient 5. Alternating dark and light bands can be seen on 13. After putting etherizer, how long it takes to cen the entire rear portion of the of the Drosophila? frog B. 3-5 minutes C. 30 minutes Cray fish D. None of the above Which of the following is the best criteria to distinguish male and female Drosophila? A. Male flies exhibit dark colored external 14. 6. What is the entire time period of complete "life genitalia on the tip of abdomen B. 10 days Only male Drosophila are red eyed D. 1000 days C. Females are smaller in size D. All of the above Which of the following is the list of characteristics used to distinguish male and 7. Which of the following is the example of used in Mendel's experiment? A. Yellow vs. Green or Wrinkled vs. Sa B. White vs. purple or wrinkled vs. Sn C. Yellow vs. Green or short vs. long 15. Size, shape, color C. D. Chromosomal abundance None of the above White vs. purple or short vs longExplanation / Answer
1. A. Drosophila displays a holometabolous method of development, meaning that they have three distinct stages of their post-embryonic life cycle from fertilized egg, each with radically different body plans: larva, pupa and adult (imago).
2.B. The egg of a Drosophila is oval in shape with two filaments at one end and the egg is covered with a tough layer known as chorion.
3.D. Drosophila lays about 1200 eggs in the lifetime and takes only 12 days to complete the life cycle, They are easy to grow and study with a clear genetic background of four homologous chromosome pairs and its whole genomic sequence has been published in 2000.
4.D. The fly is used to study embryonic development, basic biological, physiological and neurological disorders.
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