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Chapters
1: Reproduction in Organisms
2: Sexual Reproduction in Flowering Plants
3: Human Reproduction
4: Reproductive Health-Problems and Strategies
Unit 2 – Genetics and Evolution
▶ 5: Principles of Inheritance and Variation
Chapter 6: Chromosomes, Sex-Linked Inheritance and Human Genetic Disorders
Chapter 7: Molecular Basis of Inheritance
Chapter 8: Evolution-Origin of Life
Chapter 9: Theory of Evolution and Evolution of Man
Unit 3 – Biology and Human Welfare
Chapter 10: Human Health and Diseases
Chapter 11: Adolescent Issues: Alcoholism and Drugs
Chapter 12: Animal Breeding for Improvement in Food Production
Chapter 13: Plant Breeding to Enhance Food Production
Chapter 14: Microbes in Human Welfare
Unit 4 – Biotechnology
Chapter 15: Biotechnology: Principles and Processes
Chapter 16: Biotechnology and Its Applications
Unit 5 – Ecology and Environment
Chapter 17: Organisms and Populations
Chapter 18: Ecosystem
Chapter 19: Biodiversity and Conservation
Chapter 20: Environmental Issues
![Sarita Aggarwal solutions for बायोलॉजी [इंग्रजी] इयत्ता १२ आईएससी chapter 5 - Principles of Inheritance and Variation - Shaalaa.com](/images/biology-english-class-12-isc_6:65d11b7ee3eb4277bbdac77874c6c42a.jpg "Sarita Aggarwal solutions for बायोलॉजी [इंग्रजी] इयत्ता १२ आईएससी chapter 5 - Principles of Inheritance and Variation")
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Solutions for Chapter 5: Principles of Inheritance and Variation
Below listed, you can find solutions for Chapter 5 of CISCE Sarita Aggarwal for बायोलॉजी [इंग्रजी] इयत्ता १२ आईएससी.
Sarita Aggarwal solutions for बायोलॉजी [इंग्रजी] इयत्ता १२ आईएससी 5 Principles of Inheritance and Variation EXERCISES [Pages 250 - 251]
A. OBJECTIVE QUESTIONS Multiple choice questions Choose the correct answer:
In a pea plant the gene T for tallness is dominant over the gene t for dwarfness. If two heterozygous individuals are crossed ______.
the phenotypic and the genotypic ratio will be the same.
the genotypic ratio would be (3 : 1)
the phenotypic ratio would be 3 dwarf : 1 tall
(25%) individuals would be dwarf
When a hybrid of F1 is crossed with the homozygous recessive parent, it is called ______.
monohybrid cross
dihybrid cross
test cross
none of the above
When Aa hybrid is crossed back with the homozygous dominant parent, the phenotypic ratio of the progeny will be ______.
3 : 1
1 : 2 : 1
all would resemble the dominant parent
2 hybrid : 2 recessive
Which of the following terms represent a pair of contrasting characters?
allelomorphs
homozygous
heterozygous
coccus
When two organisms are similar in their external form but differ in their genetic make-up, they are referred as ______.
genotype
phenotype
homozygous
heterozygous
A character that appears in the homozygous condition only is called ______.
heterozygous
phenotype
recessive
heterozygous
A typical F2 1 : 2 : 1 phenotypic ratio in a monohybrid cross is characteristic of ______.
incomplete dominance
co-dominance
law of dominance
dominant
Blood groups in humans is an example of ______.
incomplete dominance
co-dominance
quantitative inheritance
pleiotropy
Complementary genes give a characteristic ratio of ______.
9 : 3 : 3 : 1
9 : 3 : 4
9 : 7
15 : 1
Agene that has many phenotypic effects is called ______.
complementary gene
supplementary gene
cumulative gene
pleiotropic gene
How many kinds of gametes are possible with the genotype AaBB?
AB and aB
Aa and BB
A, a, B and B
AB, Aa, BB and aB
What is the probability of getting the gamete ab from the genotype Aabb?
25%
50%
75%
100%
If all the offspring have the genotype Aa, most probably the parental genotypes could bе ______.
Aa and Aa
AA and aa
aa and Aa
AA and Aa
An individual with unknown genotype is crossed with homozygous recessive for the trait, all the offsprings produced showed the dominant phenotype. The unknown genotype would be ______.
AA
Aa
aa
AB
Solutions for 5: Principles of Inheritance and Variation
Sarita Aggarwal solutions for बायोलॉजी [इंग्रजी] इयत्ता १२ आईएससी chapter 5 - Principles of Inheritance and Variation
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