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9. Heredity and Evolution-Inherited Traits Science Class 10 In English-CBSE Notes
Last Updated : 15 March 2026
Explore science cbse notes for Class 10 Chapter 9. Heredity and Evolution Topic Inherited Traits in English medium for exams preparation.
9. Heredity and Evolution-Inherited Traits Science Class 10 In English-CBSE Notes
Last Updated : 15 March 2026
9. Heredity and Evolution-Inherited Traits Science Class 10 In English-CBSE Notes
9. Heredity and Evolution
Inherited Traits
Inherited Traits
Dominant Traits : Those inherited traits of parents which are visible in the offspring, called dominant traits.
Recessive Traits : Those inherited traits of parents which are hiden in the offspring are called recessive traits.
Example: short plant (t) in Mendel's experiment.
Genotype: Gynotype is a group of genes which is responsible for a special characteristic. It is a genetic information present in cells and It is not visible directly in the indivisual.
Examples of genotypes:
(a) The gene responsible for colour of eyes.
(b) The gene responsible for colour of hair.
(c) The gene responsible for height.
(d) The gene responsible for the heridetory(genetic) diseases.
How to make genotype changes.
(a) Changing in gene and chromosome.
(b) Recombination of gene.
(c) Hybriding of gene.
Phenotypes: Those visible traits which are seen in the organism and depends on genotype is called phenotype traits.
But it can be influenced by the envirmental factors. This is the manifestation of the informations of gene. It can be found by simple observation.
Examples: colour of eyes, colour of hair, height, voice, some diseases and some fixed behavior.
Differences Between Inherited Traits:
Acquired Traits:
1. These are the traits which are developed in an individual due to special conditions
2. They cannot be transferred to the progeny(offspring).
3. They are helpful in evolution
eg. Low weight of starving beetles.
Inherited Traits:
1. These are the traits which are passed from one generation to the next.
2. They get transferred to the progeny(offspring).
3. They are helpful in evolution.
eg. Colour of eyes and hair
Monohybrid cross in Mendel's Experiment :
In this experiment Mendel's had taken two pea plants of single character of tall and short plant as parent plants. All plants are tall as tall as parent. Mendelian experiments test this by getting both the parental plants and these F1 tall plants to reproduce by self-pollination. The second-generation, or F2, progeny of the F1 tall plants are not all tall. Instead, one quarter of them are short. This indicates that both the tallness and shortness traits were inherited in the F1 plants, but only the tallness trait was expressed.
Ratio of characters in Mendelian experiment:
There are following ratios of characters of plants grown in F2 generation on the basis of genotype and phenotype in Mendel's monohybrid cross test.
Phenotype : Tt Tt Tt tt (3 : 1)
3 tall and 1 short plant
Genotype: Tt Tt Tt tt (1: 2 : 1)
Genetically 1 tall (TT) : 2 tall (Tt) : 1 short (tt)
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NCERT Solutions for Class 10 science Chapter 9. Heredity and Evolution Topic Inherited Traits
NCERT Solutions for Class 10 science Chapter 9. Heredity and Evolution Topic Inherited Traits are prepared to help students understand important concepts of the chapter in a simple and clear manner. These solutions are based on the latest CBSE syllabus and follow the official NCERT textbooks. Students who are searching for accurate answers and step-by-step explanations can use these solutions to improve their learning and prepare better for school exams as well as board examinations.
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About Chapter 9. Heredity and Evolution of Class 10 science
Chapter 9. Heredity and Evolution is an important part of the Class 10 science syllabus. This chapter explains several key concepts which are essential for understanding the subject in detail. Students often face difficulties while solving textbook questions related to this chapter. That is why NCERT Solutions for Chapter 9. Heredity and Evolution are provided to explain every concept in a simple and structured way.
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Understanding Topic: Inherited Traits
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9. Heredity and Evolution-Inherited Traits Science Class 10 In English-CBSE Notes
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