biology 2 (12th)
Quiz by Mrinal Naik
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- Q1
1.The genetic ratio of 9 : 3 : 3 : 1 is due to:
Independent assortment of genes
Segregation of characters
Homologous pairing between chromosomes
Crossing over of character
30s - Q2
2.Choose the chromosome, in a human, that possesses least number of genes.
21st chromosome
X-Chromosome
Y-Chromosome
Autosome
30s - Q3
3. G.J. Mendel was a:
Australian monk
British monk
German scientist
Austrian monk
30s - Q4
4.Select the incorrect match.
Codominance– Both gene express their expression independently
None of these
Pleiotropy– More than two alternative forms of a gene
Both(b) and (c)
30s - Q5
5.In a dihybrid cross, if you get 9:3:3:1 ratio it denotes that:
The alleles of two genes are interacting with each other
It is a case of multiple allelism
It is a multigenic inheritance
The alleles of two genes are segregating independently.
30s - Q6
6.A monohybrid cross produced tall and dwarf pea plants in ratio of 3 : 1. Their genotypes would be:
Tt× Tt
Tt ×tt
TT× Tt
TT× tt
30s - Q7
7. Common test to find genotype of hybrid is by:
Studying sexual behavior of F1 progeny
CrossingF1 individuals with recessive parents
Crossing one F2 progeny with male parent
Crossing one F2 progeny with female parent
30s - Q8
8.Which one is a test cross?
Ww× ww
WW× Ww
ww× ww
Ww× Ww
30s - Q9
9.Matingof an organism to a double recessive in order to determine whether it is homozygous or heterozygous for a character under consideration is called:
Testcross
Reciprocal cross
Dihybrid cross
Backcross
30s - Q10
10. Across between two tall plants resulted in offspring having few dwarf plants. What would be the genotypes of both the parents?
Tt and tt
TT and TT
Tt and Tt
TT and Tt
30s - Q11
11. The term genetics was proposed by:
Bateson
Johannsen
Mendel
Morgan
30s - Q12
12. TheF2 genotypic ratio of monohybrid cross is:
2: 1 : 2
1 :2 : 1
9 :3 : 3 : 1
1 :1
30s - Q13
13. A dihybrid for qualitative trait is crossed with homozygous recessive individual of its type, the phenotype ratio is:
1 :1 : 1 : 1
3 :1
9 :7
1: 2 : 1
30s - Q14
14. In order to find out the different types of gametes produced by a pea plant having genotype AaBb, it should be crossed with a plant with the genotype:
AABB
AABb
AaBb
aabb
30s - Q15
15. The autosomal disorder/disease in humans is :
Colour blindness
Thalassemia
Haemophilia
Turner’s Syndrome
30s