CBSE
Multiple Choice QuestionsOne gene – one enzyme hypothesis was postulated by
R. Franklin
Hershey and Chase
A. Garrod
A. Garrod
The genotypes of a Husband and Wife are IAIB and IAi. Among the blood types of their children, how many different genotypes and phenotypes are possible?
3 genotypes ; 3 phenotypes
3 genotypes ; 4 phenotypes
4 genotypes ; 3 phenotypes
4 genotypes ; 3 phenotypes
Test cross involves
crossing between two genotypes with recessive trait
crossing between two F1 hybrids
crossing the F1 hybrid with a double recessive genotype
crossing the F1 hybrid with a double recessive genotype
Which one from those given below is the period for Mendel's hybridization experiments?
1856 - 1863
1840 - 1850
1857 - 1869
1857 - 1869
A disease caused by an autosomal primary non-disjunction is
Down's syndrome
Klinefelter's syndrome
Turner's syndrome
Turner's syndrome
Which of the following characteristics represent ‘Inheritance of blood groups’ in humans?
a. Dominance
b. Co-dominance
c. Multiple allele
d. Incomplete dominance
e. Polygenic inheritance
b, c and e
a, b and c
a, c and e
b, d and e
If a colourblind woman marries a normal visioned man, their sons will be
all normal visioned
one-half colourblind and one-half normal
three-fourths colourbling and one-fourth normal
three-fourths colourbling and one-fourth normal
Both sickle cell anaemia and Huntington's chorea are
bacteria-related diseases
congenital disorders
pollutant-induced disorders
pollutant-induced disorders
Sickle cell anaemia has not been eliminated from the African population because
it is controlled by recessive genes
it is not a fatal disease
it provides immunity against malaria
it provides immunity against malaria
Among the following characters, which one was not considered by Mendel in his experiments on pea?
Stem – Tall or Dwarf
Trichomes – Glandular or non-glandular
Seed – Green or Yellow
Seed – Green or Yellow
