Due to the cross between TTRr × ttrr the resultant progenies showed how many percent plants tall, red flowered:
1. 50%
2. 75%
3. 25%
4. 100%
Which of the following is the correct match:
1. Down Syndrome = 21st Chromosome
2. Sickel cell anaemia = X – Chromosome
3. Haemophilia = Y – Chromosome
4. Parkinson Disease = X & Y Chromosomes
Irregularity is found in drosophila during organ differentiation for example- in place of the wing, long legs are formed. Which gene is responsible for it:
1. Double dominant gene
2. Homeotic gene
3. Complimentary gene
4. Plastid
Change in the sequence of nucleotides in DNA is called:
1. Mutagen
2. Mutation
3. Recombination
4. Translation
Which statement is correct:
1. | A. indica is the largest wild honey bees |
2. | Wax is the waste material of honey bees |
3. | C.V. Fritsch discovered the transmission methods in honey bees |
4. | Drone of the honey bee is diploid |
Which of the following is the example of a sex-linked disease:
1. AIDS
2. Colour blindness
3. Syphilis
4. Gonorrhoea
Which of the following is the example of a pleiotropic gene:
1. Haemophilia
2. Thalassemea
3. Sickle cell anaemia
4. Colour blindness
A gene is said to be dominant if:
1. | It expresses its effect only in the homozygous stage |
2. | It expresses only in heterozygous condition |
3. | It expresses both in homozygous and heterozygous conditions |
4. | It is never expressed in any condition |
A plant of F1-generation with genotype "AABbCC". On selfing of this plant what is the phenotypic ratio in F2-generation:
1. 3 : 1
2. 1 : 1
3. 9 : 3 : 3 : 1
4. 27 : 9 : 9 : 9 : 3 : 3 : 3 : 1
A diseased man marries a normal woman. They get three daughters and five sons. All the daughters were diseased and the sons were normal. The gene of this disease is:
1. Sex-linked dominant
2. Sex-linked recessive
3. Sex-limited character
4. Autosomal dominant