Extranuclear inheritance occurs in:
1. Killer paramaecium
2. Killer Amoeba
3. Euglena
4. Hydra
Sickle cell anaemia is due to:
1. | Change of Amino Acid in α-chain of Haemoglobin. |
2. | Change of Amino Acid in β-chain of Haemoglobin. |
3. | Change of Amino acid in both α and β chains of Haemoglobin. |
4. | Change of Amino acid either α or β chain of Haemoglobin. |
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:
1. | 1/4 | 2. | 1/8 |
3. | 1/16 | 4. | 1/32 |
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