Biology Lab Practice Questions With Answers (Set 04)

1. Why does crossing over involve non sister chromatids instead of sister chromatids?
2. Do the chromosomes inherited from the mother of father always remain together following meiosis I? Explain.
3. Name two ways that meiosis contributes to genetic variation among offspring.
4. In section III.1 (page 5), what is the inheritance pattern for this genetic disorder?
5. In section III.1 (page 5), what is the genotype of Generation I, Individual 1?
6. In section III.1 (page 5), what is the genotype of Generation II, Individual 1?
7. In section III.1 (page 5), what is the genotype of Generation III, Individual 8?
8. In section III.2 (page 5-6), what is the inheritance pattern for this genetic disorder?
9. In section III.2 (page 5-6), what is the genotype of Generation I, Individual 1?
10. In section III.2 (page 5-6), what is the genotype of Generation II, Individual 8?
11. In section III.2 (page 5-6), what is the genotype of Generation III, Individual 1?
12. In section IV (DNA Biology and technology), which step represents deproteinization?
13. In section IV (DNA Biology and technology), which step represents precipitation of DNA?
14. During anaphase of mitosis in humans or other 2n organisms, do the chromosomes have one or two chromatids as they move toward the poles?
15. During anaphase of meiosis I in humans or other 2n organisms, do the chromosomes have one or two chromatids as they move toward the poles?
16. During anaphase of meiosis II in humans or other 2n organisms, do the chromosomes have one or two chromatids as they move toward the poles?
17. Asexual reproduction of a haploid protozoan can be described as n → n. Explain.
18. Explain why furrowing is a suitable mechanism for cytokinesis of animal cells but not plant cells?
19. If there are 13 pairs of homologues in a primary spermatocyte, how many chromosomes are there in a sperm?
20. Give one major difference between mitosis and meiosis.
21. A person with Down syndrome has what type of chromosome anomaly?
22. Explain why DNA is said to have a structure that resembles a ladder.
23. Explain why the genetic code is called a triplet code.
24. Which of DNA, mRNA, tRNA, Amino acids is involved in transcription?
25. Which of DNA, mRNA, tRNA, Amino acids is involved in translation?
26. During the isolation of DNA, what role was played by the detergent?
27. During the isolation of DNA, what role was played by the meat tenderizer?
28. During the isolation of DNA, what role was played by ethanol?
29. What is the purpose of gel electrophoresis?
30. In a gel electrophoresis experiment, to which pole (positive or negative) does the DNA migrate to?

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