Extranuclear inheritance occurs in:
1.  Killer paramaecium
2.  Killer Amoeba
3.  Euglena
4.  Hydra

Sickle cell anaemia is due to:

No. of Bar Body in XXXX female:
1.   1
2.   2
3.   3
4.   4

Male XX and female XY sometime occur due to:
1.  Deletion
2.  Transfer of segments in X and Y chromosomes
3.  Aneuploidy
4.  Hormonal imbalance

Two nonallelic genes produce the new phenotype when present together but fail to do so independently then it is called:
1.  Epistasis
2.  Polygene
3.  Non-complimentary gene
4.  Complimentary gene

The probability of four sons to a couple is:

Which statement is correct about the centre of origin of the plant:
1.  More diversity in an improved variety
2.  Frequency of the dominant gene is more
3.  Climatic conditions more favourable
4.  None

A and B genes are linked. What shall be the genotype of progeny in a cross between AB/ab and ab/ab:
1.  AAbb and aabb
2.  AaBb and aabb
3.  AABB and aabb
4.  None

When dominant and recessive alleles express themselves together it is called:
1.  Co-dominance
2.  Dominance
3.  Amphidominance
4.  Pseudo dominance

The ratio of complementary genes is:
1.  9 : 3 : 4
2.  12 : 3 : 1
3.  9 : 3 : 3 : 4
4.  9 : 7