MULTIPLE CHOICE QUESTIONS
PRINCIPLES OF INHERITANCE AND VARIATON
1. Individuals having dissimilar traits (alleles) on homologous chromosomes are called
a)Heterozygous
b) Homozygous
c) Dominant
d)Recessive
2. An allele is considered dominant
a) When it express in homozygosity
b) When it express even in the presence of alternate allele
c) When it express desirable phenotype
d) Both (b) and (c)
3. Mendel’s dihybrid ratio is
a) 1:1:1:1
b) 3:1
c) 9:3:3:1
d) 9:1:1:5
4. Mendel studied seven contrasting characters for his breeding experiment with Pisum sativum,
which of the following characters did he not use?
a) Pod shape
b) Leaf shape
c) Plant height
d) Pod color
5. An organism with two identical allele of a gene in a cell is called
a) Heterozygous
b) Homozygous
c) Hybrid
d) Homozygous
6. Which principle of inheritance was not given by Mendel
a)Independent assortment
b)Dominance
c) Purity of gametes
d)Linkage
7. When dominant BB and recessive bb is crossed, the percentage of progeny showing the parental
genotype is
a)0%
b) 25%
c) 50%
d)75%
, 8. The year 1900AD is highly significant for genetics due to
a)Chromosome theory of heredity
b) Discovery of genes
c) Rediscovery of Mendelism
d)Principle of linkage
9. The process by which the segregation of Mendelian factors takes place is
a)Hybridisation
b)Mitosis
c)Meiosis
d) Fertilisation
10. Which would most probably be the genetic makeup of the parents of a colour blind daughter?
a)Carrier mother and normal father
b) Carrier mother and color blind father
c) Color blind mother and normal father
d)Normal mother and normal father
11. If a heterozygous tall plant is crossed with a homozygous dwarf plant the proportion of dwarf
progeny will be
a)25%
b)50%
c)75%
d)100%
12. When two tall plants are crossed 45 tall plants and 14 dwarf plants are obtained.The genotype of
parent plants is
a)TT x TT
b)TT x tt
c)Tt x Tt
d)TT x Tt
13.Which of the following is not a dominant character selected by Mendel in Pisum?
a) Yellow pod color
b) Violet flower colour
c) Axillary flowers
d) Yellow seed colour
14. Variation can occur due to
a) Mutations
b) Recombination
c) Fertilisation
d) All of these
15. Who discovered the phenomenon of incomplete dominance in Mirabilis and Antirrhinum?
a) De Vries
b) Bateson
c) Carl Correns
PRINCIPLES OF INHERITANCE AND VARIATON
1. Individuals having dissimilar traits (alleles) on homologous chromosomes are called
a)Heterozygous
b) Homozygous
c) Dominant
d)Recessive
2. An allele is considered dominant
a) When it express in homozygosity
b) When it express even in the presence of alternate allele
c) When it express desirable phenotype
d) Both (b) and (c)
3. Mendel’s dihybrid ratio is
a) 1:1:1:1
b) 3:1
c) 9:3:3:1
d) 9:1:1:5
4. Mendel studied seven contrasting characters for his breeding experiment with Pisum sativum,
which of the following characters did he not use?
a) Pod shape
b) Leaf shape
c) Plant height
d) Pod color
5. An organism with two identical allele of a gene in a cell is called
a) Heterozygous
b) Homozygous
c) Hybrid
d) Homozygous
6. Which principle of inheritance was not given by Mendel
a)Independent assortment
b)Dominance
c) Purity of gametes
d)Linkage
7. When dominant BB and recessive bb is crossed, the percentage of progeny showing the parental
genotype is
a)0%
b) 25%
c) 50%
d)75%
, 8. The year 1900AD is highly significant for genetics due to
a)Chromosome theory of heredity
b) Discovery of genes
c) Rediscovery of Mendelism
d)Principle of linkage
9. The process by which the segregation of Mendelian factors takes place is
a)Hybridisation
b)Mitosis
c)Meiosis
d) Fertilisation
10. Which would most probably be the genetic makeup of the parents of a colour blind daughter?
a)Carrier mother and normal father
b) Carrier mother and color blind father
c) Color blind mother and normal father
d)Normal mother and normal father
11. If a heterozygous tall plant is crossed with a homozygous dwarf plant the proportion of dwarf
progeny will be
a)25%
b)50%
c)75%
d)100%
12. When two tall plants are crossed 45 tall plants and 14 dwarf plants are obtained.The genotype of
parent plants is
a)TT x TT
b)TT x tt
c)Tt x Tt
d)TT x Tt
13.Which of the following is not a dominant character selected by Mendel in Pisum?
a) Yellow pod color
b) Violet flower colour
c) Axillary flowers
d) Yellow seed colour
14. Variation can occur due to
a) Mutations
b) Recombination
c) Fertilisation
d) All of these
15. Who discovered the phenomenon of incomplete dominance in Mirabilis and Antirrhinum?
a) De Vries
b) Bateson
c) Carl Correns
