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Biology 10 Chapter 15 - Inheritance - 12
1.
What is the dominance relationship between blood group alleles IA and IA?
a) Complete dominance
b) Co-dominance
c) Variation
d) Incomplete dominance
2.
If genotype is IAIB, what is the relationship between alleles?
a) Allele IA is recessive over IB
b) Allele IA and IB are co-dominant
c) Allele IA is dominant over IB
d) Allele IB is dominant over allele IA
3.
What is the situation in heterozygous genotype called in which both the alleles express as a blend and neither allele is dominant over the other?
a) Incomplete dominance
b) Complete dominance
c) Co-dominance
d) Variation
4.
Which of the following is the example of incomplete dominance?
a) Four O clock plant
b) Continuous variation
c) Discontinuous variation
d) Human blood group AB
5.
In Four O Clock plants, how many colours are present?
a) Four
b) Three
c) Two
d) One
6.
Which of the following colour is present in Four O Clock plants?
a) Green
b) Red
c) Yellow
d) Purple
7.
Which of the following colour is present in Four O Clock plants?
a) Pink
b) Green
c) Purple
d) Yellow
8.
Which of the following colour is present in Four O Clock plants?
a) Green
b) Yellow
c) Purple
d) White
9.
Which of the following colour is present in Four O Clock plants?
a) Pink
b) All of these
c) White
d) Red
10.
In Four O clock plant, by how many alleles the trait of flower colour is controlled?
a) One
b) Two
c) Four
d) Three
11.
Which of the following allele shows red flowers?
a) Allele Rr
b) Allele RR
c) Allele rr
d) Allele rR
12.
Which of the following allele shows red flowers?
a) Allele rr
b) Allele Rr
c) Allele RR
d) Allele rR
13.
When a homozygous red flowered plant is crossed with homozygous white flowered plant, the heterozygous plants of F1 generation produce..................?
a) Pink flowers
b) Red flowers
c) Yellow flowers
d) White flowers
14.
What is the blend of red and white flowers of Four O clock flowers?
a) Pink flowers
b) Red flowers
c) White flowers
d) Yellow flowers
15.
Pink colour of Four O clock flowers are the blend of....................?
a) White and yellow
b) Red and yellow
c) White and red
d) None of these
16.
A purple-flowered pea plant has the genotype PP. Which of the following statements about this plant is FALSE?
a) All the gametes will have the same flower colour allele
b) Its phenotype will be white flowers
c) When bred to a white-flowered plant, all offspring will be purple flowered
d) It has a homozygous dominant genotype
17.
What produces variations in the next generation?
a) Fragmentation
b) Sexual reproduction
c) Asexual reproduction
d) Binary fission
18.
What are the main sources of variations in next generations?
a) Mutations
b) Genetic recombination
c) Fertilization
d) All of these
19.
What are the main sources of variations in next generations?
a) All of these
b) Gene flow
c) Mutations
d) Genetic recombination
20.
What is the ratio of red, pink and white flowers of Four O clock plant of F2 generation?
a) 1:2:1
b) 3:2:1
c) 2:2:1
d) 1:2:3
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