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- Question
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
- Correct Answer
- 1:1:1:1
- 1. 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
- 2. 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
- 3. Raphanobrassica is a classical example of
Options- A. aneuploidy
- B. nullisomy
- C. allopolyploidy
- D. None of the above Discuss
- 4. 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
- 5. 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 Discuss
- 6. Diethyl stilbestrol (DES), a synthetic estrogen causes
Options- A. chromosome lagging
- B. disruption of mitotic spindle
- C. centriole elongation
- D. all of the above Discuss
- 7. The percentage of individual with a given genotype, which exhibits the associated phenotype, is defined as
Options- A. penetrance
- B. expressivity
- C. inheritance percent
- D. environmental influence Discuss
- 8. An odd number of cross overs in inverted region will result into formation of a dicentric chromatid and acentric chromatid at anaphase I incase of
Options- A. pericentric inversion
- B. paracentric inversion
- C. double inversion
- D. none of these Discuss
- 9. How many chromosomes are there in Caernorhabditis elegans?
Options- A. 3
- B. 6
- C. 9
- D. 12 Discuss
- 10. Which of the following denotes a pair of contrasting characters?
Options- A. Alleles
- B. Phenotype
- C. Homozygous
- D. Genotype Discuss
Animal Biotechnology Chromosomes problems
Search Results
Correct Answer: It is governed by many genes with small cumulative effect
Correct Answer: expressivity
Correct Answer: allopolyploidy
Correct Answer: translocation heterozygote
Correct Answer: Hypertranscription of male X chromosome
Correct Answer: all of the above
Correct Answer: penetrance
Correct Answer: paracentric inversion
Correct Answer: 6
Correct Answer: Alleles
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