Animal Biotechnology Chromosomes(Biotechnology ) Questions and Answers
Question 1. Transmission of a gene from male parent to female child to male grand child is known as
criss-cross inheritance
quantitative inheritance
holandric inheritance
maternal inheritance
Explanation:-
Answer: Option A. -> criss-cross inheritance
Question 2. 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
paracentric inversion
none of these
double inversion
pericentric inversion
Explanation:-
Answer: Option A. -> paracentric inversion
Question 3. The percentage of individual with a given genotype, which exhibits the associated phenotype, is defined as
environmental influence
penetrance
inheritance percent
expressivity
Explanation:-
Answer: Option B. -> penetrance
Question 4. Bar eye character of Drosophila is due to
due to presence of additional X-chromosome
due to a point mutation in eye-locus
deletion in region of 16A of X chromosome
duplication in region of 16A of X chromosome
Explanation:-
Answer: Option D. -> duplication in region of 16A of X chromosome
Question 5. Diethyl stilbestrol (DES), a synthetic estrogen causes
disruption of mitotic spindle
chromosome lagging
All of these
centriole elongation
Explanation:-
Answer: Option C. -> All of these
Question 6. The degree or extent to which a given genotype is expressed phenotypically in a particular individual is defined as
expressivity
inheritance strength
environmental influence
penetrance
Explanation:-
Answer: Option A. -> expressivity
Question 7. Which of the following denotes a pair of contrasting characters?
Phenotype
Genotype
Homozygous
Alleles
Explanation:-
Answer: Option D. -> Alleles
Question 8. If two genes show 50% recombination
both (a) and (b)
they are on different chromosomes
they are closely located on the same chromosome
they are on same chromosome but far apart
Explanation:-
Answer: Option A. -> both (a) and (b)
Question 9. How many chromosomes are there in Caernorhabditis elegans?
12
6
3
9
Explanation:-
Answer: Option B. -> 6
Question 10. A map of chromosomes that utilizes cloned and sequenced DNA fragments rather than genetic markers is known as