The allele for tallness is dominant over that of dwarfness. This is called:
1. Law of independent assortment
2. Law of segregation
3. Law of unit character
4. Law of dominance
What ratio is expected in offsprings if father is colour blind and mother's father was colour blind:
1. 50% daughter – colour blind
2. All the sons are colour blind
3. All the daughters colour blind
4. All the sons are normal
When AABBcc is crossed with AaBbCc then the ratio of hybrid for all three genes is:
1. 1/8
2. 1/4
3. 1/16
4. 1/32
Among fraternal twins, one baby is haemophilic while the baby's brother is normal. Which statement is true:
1. Baby is male
2. Baby is female
3. Mother is heterozygous
4. Mother is homozygous
Minor change in a gene's structure is called:
1. Reversible mutation
2. Point mutation
3. Forward mutation
4. Backward mutation
According to Mendelism which character is showing dominance:
1. Terminal position of the flower
2. Green colour in the seed coat
3. Wrinkled seed
4. Green pod colour
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