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- Question
How does dosage compensation in Drosophila occur?
Options- A. Hypertranscription of male X chromosome
- B. Hypotranscription of female X chromosome
- C. X inactivation in females
- D. Chimerism
- Correct Answer
- Hypertranscription of male X chromosome
- 1. Transmission of a gene from male parent to female child to male grand child is known as
Options- A. holandric inheritance
- B. quantitative inheritance
- C. criss-cross inheritance
- D. maternal inheritance Discuss
- 2. A diagram depicting chromosomes of haploid set of an organism ordered in a series of decreasing size is known as
Options- A. zymogram
- B. chromogram
- C. idiogram
- D. karyogram Discuss
- 3. Hairy wing character of Drosophila is due to
Options- A. duplication in region of chromosome
- B. deletion in region of chromosome
- C. due to presence of additional X-chromosome
- D. due to a point mutation Discuss
- 4. A map of chromosomes that utilizes cloned and sequenced DNA fragments rather than genetic markers is known as
Options- A. a physical map
- B. a genetic map
- C. a cloning map
- D. none of these Discuss
- 5. How many chromosomes are there in the budding yeast (S. cerevisiae)?
Options- A. 16
- B. 17
- C. 18
- D. 20 Discuss
- 6. A cross shaped (+) or a ring involving four chromosomes may be formed during metaphase I in case of
Options- A. translocation heterozygote
- B. deficiency
- C. haploid organism
- D. duplication Discuss
- 7. Raphanobrassica is a classical example of
Options- A. aneuploidy
- B. nullisomy
- C. allopolyploidy
- D. None of the above Discuss
- 8. The degree or extent to which a given genotype is expressed phenotypically in a particular individual is defined as
Options- A. penetrance
- B. expressivity
- C. inheritance strength
- D. environmental influence Discuss
- 9. Which of the following is correct when a character shows continuous variation assuming a normal distribution?
Options- A. It is governed by many genes with small cumulative effect
- B. It is not controlled genetically
- C. Many of the variation is due to fluctuation of climate
- D. None of the above Discuss
- 10. In a dihybrid cross, the progeny of an Fl individual (hetero2ygous for both characters) will show a phenotypic ratio of
Options- A. 1:1:1:1
- B. 1:2:2:1
- C. 9:3:3:1
- D. 3:1:1:3 Discuss
Animal Biotechnology Chromosomes problems
Search Results
Correct Answer: criss-cross inheritance
Correct Answer: idiogram
Correct Answer: duplication in region of chromosome
Correct Answer: a physical map
Correct Answer: 16
Correct Answer: translocation heterozygote
Correct Answer: allopolyploidy
Correct Answer: expressivity
Correct Answer: It is governed by many genes with small cumulative effect
Correct Answer: 1:1:1:1
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