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- 1. Multiple Choice
Starch grain in pea plant shows
Recessive Epistasis
Incomplete dominance
Co-dominance
Dominant Epistasis
- 2. Multiple Choice
When a heterozygous pea plant with yellow round seeds is crossed with a homozygous pea plant with yellow round seeds, the genotype not obtained is
YyRr
YyRR
YYrr
YYRR
- 3. Multiple Choice
Which of the following will be used to determine whether the organism is homozygous or heterozygous for a character?
back cross
test cross
reciprocal cross
dihybrid cross
- 4. Multiple Choice
Which of the following scientists was not associated with rediscovery of Mendelian laws?
Hugo de Vries
Carl Correns
Alfred Sturtevant
Eric von Tschermak
- 5. Multiple Choice
In pleiotropy,
The phenotype is determined by the cumulative effect of interacting genes
One gene mediates more than one phenotype
Multiple interacting alleles determine the particular phenotype of progeny
One gene masks the effect of another gene, leading to loss of expression of latter gene
- 6. Multiple Choice
Morgan’s choice of Drosophila has been proven to be useful even today for genetic experiments for following reason(s)
It has four type of chromosomes
Easy and inexpensive maintenance with short generation time and large number of offspring
Very large number of visible as well as biochemically mutant phenotypes
All of the above
- 7. Multiple Choice
If two gene A and B are linked and show 20% recombination, What will the proportion of gametes produced by F1 with genotype ++/ab, which is derived from to the dihybrid cross between ++/++ and ab/ab parent plants?
++ = 80%; ab = 20%
++ = 40%; ab = 40%; +a= 10%; +b= 10%
++ = 20%; ab= 20%; +a = 20%; +b=20%
++ = 50%; ab= 50%
- 8. Multiple Choice
The reason that linked genes are inherited together is that
they are located on the same chromosome.
the number of genes in a cell is greater than the number of chromosomes.
chromosomes are unbreakable
alleles are paired.
- 9. Multiple Choice
If a carrier woman for haemophilia marries an affected individual, then mark the incorrect statement regarding their progeny.
Half of the daughters will be affected with haemophilia
Half of the sons will be affected with haemophilia
25% of the total progeny will be carrier for the disease
75% of the total progeny will be affected with haemophilia
- 10. Multiple Choice
Statement I: Combination of genotypes are theoretically represented in a square tabular form known as Punnet square.
Statement II: Genes which code for a pair of contrasting traits are known as alleles.
Only statement I is true
Only statement II is true
Both the statements are true
Both the statements are false
- 11. Multiple Choice
Statement I: In incomplete linkage (recombination frequency less than 50%), more parental types of offspring are produced as compared to recombinant ones.
Statement II: In a test cross, the plant with unknown genotype is crossed with its dominant parent
Only statement I is incorrect
Only statement II is incorrect
Both statements are correct
Both Statements are incorrect
- 12. Multiple Choice
Statement I: If all the progenies obtained in a monohybrid test cross are of the same phenotype, the unknown individual in F1/F2 generation is homozygous dominant.
Statement II: A recessive trait is seen either due to non-functional enzyme or because of no enzyme is produced.
Only statement I is correct
Only statement II is correct
Both the statements are correct
Both the statements are incorrect
- 13. Multiple Choice
Statement I: When more than one gene mediates a single phenotypic effect, the inheritance pattern is known as pleiotropic inheritance.
Statement II: Inheritance pattern of human skin colour and human height are example of pleiotropic inheritance.
Only statement I is correct
Only statement II is correct
Both the statements are correct
Both the statements are incorrect
- 14. Multiple Choice
Statement I: If two genes are linked together, they are expected to show high recombination frequency.
Statement II: Generation of a greater number of recombinants indicates that the two genes are tightly linked.
Only statement I is true
Only statement II is true
Both the statements are true
Both the statements are false
- 15. Multiple Choice
Choose which of the following statements are correct with respect to epistasis
(1) one gene masks the expression of the other
(2) effective gene is called epistatic while affected gene is called hypostatic
(3) 9: 7 ratio is obtained in every case.
(4) effective gene is called hypostatic while affected gene is called epistatic
(1), (2) and (3) are correct
(1) and (2) are correct
(2) and (4) are correct
(1) and (3) are correct
- 16. Multiple Choice
In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F1 generation pink flowers were obtained. When pink flowers were selfed, the F2 generation showed white, red and pink flowers. Choose the incorrect statement from the following :
Pink colour in F1 is due to incomplete dominance.
Ratio of F2 is 1/4 (Red) : 2/4 (Pink) :1/4 (White)
Law of Segregation does not apply in this experiment
This experiment does not follow the Principle of Dominance.
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