291. How many base pairs are found in one genome of man?
A
7 × 104
B
2.8 × 107
C
3 × 109
D
4 × 109
Answer :
3 × 109
292. E. coli are used in production of
A
Rifampicin
B
LH
C
Ecdyson
D
Interferon
Answer :
Interferon
293. The chance of elimination of genes from a small population is an example of
A
Selection pressure
B
Speciation
C
Adaptation
D
Genetic drift
Answer :
Genetic drift
294. Haemophilia is more common in males because it is a
A
Recessive character carried by $$Y$$ chromosome
B
Dominant character carried by $$Y$$ chromosome
C
Dominant trait carried by $$X$$ chromosome
D
Recessive trait carried by $$X$$ chromosome
Answer :
Recessive trait carried by $$X$$ chromosome
295. Mostly mutations are
A
Heritable
B
Non heritable
C
Harmful
D
Beneficial
Answer :
Heritable
296. Genetic constitution of an individual is represented by
A
Genome
B
Genotype
C
Phenotyp
D
Karyotype
Answer :
Genotype
297.
Represented below is the inheritance pattern of a certain type of traits in humans.
Which one of the following conditions could be an example of this pattern?
A
Thalassemia
B
Haemophilia
C
Phenylketonuria
D
Sickle cell anaemia
Answer :
Haemophilia
298. An organism with two identical alleles is
A
dominant
B
hybrid
C
heterozygous
D
homozygous
Answer :
homozygous
299. In a random mating population in ewuilibrium, which of the following brings about a change in gene frequency in a non-directional manner
A
Mutations
B
Random drift
C
Selection
D
Migration
Answer :
Random drift
300. The longer the chromosome of an organism, the more genetic variability it gets from
A
Independent assortment
B
Linkage
C
Crossing over
D
Mutation
Answer :
Crossing over