Animal Biotechnology Chromosomes problems
- 1. 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
Correct Answer: expressivity
- 2. 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
Correct Answer: It is governed by many genes with small cumulative effect
- 3. 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
Correct Answer: 1:1:1:1
- 4. 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
Correct Answer: all of the above
- 5. 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
Correct Answer: penetrance
- 6. 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
Correct Answer: paracentric inversion
- 7. How many chromosomes are there in Caernorhabditis elegans?
Options- A. 3
- B. 6
- C. 9
- D. 12 Also asked in: Bank Exams
Correct Answer: 6
- 8. Which of the following denotes a pair of contrasting characters?
Options- A. Alleles
- B. Phenotype
- C. Homozygous
- D. Genotype Discuss
Correct Answer: Alleles
- 9. If two genes show 50% recombination
Options- A. they are on different chromosomes
- B. they are on same chromosome but far apart
- C. both (a) and (b)
- D. they are closely located on the same chromosome Discuss
Correct Answer: both (a) and (b)
- 10. Incase of inversion when the inverted segment of chromosome includes centromere, it is known as
Options- A. paracentric inversion
- B. double inversion
- C. inverted inversion
- D. pericentric inversion Discuss
Correct Answer: pericentric inversion
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