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Lakhmir Singh Biology Class 10 Solutions Heredity and Evolution (Chapter 4)

Lakhmir Singh and Manjit Kaur Solutions for Class 10 Biology Chapter 4 – Heredity and Evolution are based on the variations that can be seen in different organisms. The main topics of the chapter include accumulation of variation during reproduction, rules for the inheritance of traits – Mendel’s Contributions, heredity, inherited traits, how do these traits get expressed, and sex determination.

The complete descriptions of different topics such as evolution contain an explanation, acquired and inherited traits further help you to know facts related to the inbuilt tendency to variant during the time of reproduction due to faults in DNA copying. The chapter has around 10 exercises with a total of 167 questions. With the help of these Lakhmir Singh Solutions provided by Instasolv, you can understand them all.

This chapter is going to be very easy once you get access to our solutions. We make the chapter interesting for you so that you can grasp the entire content properly. You can use Lakhmir Singh and Manjit Kaur Solutions for Class 10 Biology Chapter 4 for CBSE Board exam preparation along with preparing for Olympiads.

Important Topics for Lakhmir Singh and Manjit Kaur Solutions for Class 10 Biology Chapter 4 – Heredity and Evolution

Chapter 4 – Heredity and Evolution is an important topic in Biology. So, to clear your concepts below is a short description of the chapter for you.  

Sexual Reproduction

The mode of reproduction includes two organisms i.e. one male and one female. They generate sex cells or gametes which fuse to produce a new organism.

Genes

The functional unit of heredity is called genes. Every gene monitors one or various specific representative features in living organisms.

Heredity

The method by which the features of a creature are passed on from one generation to another is termed as heredity. The procedure is done by genes, which describe the characters of the organism.

Dominant Traits

The traits that express themselves in a creature in every possible combination and can be observed are known as Dominant traits. In Mendel’s experiment, the tall trait in pea plants inclines to precise more than the short trait. Thus, the tall trait of the plant is assumed to be leading over the short trait.

Recessive Traits

A trait which is not stated in the existence of a dominant allele is termed as recessive. So, the recessive trait is present in a creature but cannot be observed if a dominant allele happens.

Laws of Mendel

The Law of Dominance says that a gene has two conflicting alleles and one always expresses itself in the creature. It is called the leading gene and it states in any possible mixture.

Sex Determination

The procedure for determining the sex of an individual is called sex determination. In several animals, the sex of an embryo is determined by several factors. In humans, sex determination happens on the basis of the significance of the Y chromosome.

Genetic Variations

The variances in the DNA sequences among every creature leading to the varied gene pool are termed as genetic variations. These variances lead to different physical characters or biochemical pathways.

Speciation

It is the process of development of a new species from the current ones due to numerous evolutionary forces like genetic drift, natural selection, isolation of populations, etc.  Speciation indications to diversity in the ecosystem whereas diversity leads to evolution.

Evolution

Evolution is a physical change in the heritable features of a population over other generations. These variations can give growth to a new species or the species might change themselves to become superior to the nearby environment.

Exercise-Wise Discussion of Lakhmir Singh Solutions for Class 10 Biology Chapter 4

Lakhmir Singh Class 10 Biology Solutions Chapter 4 has around 10 exercises with a total of 167 questions. Here, you will find the exercise-wise solutions in a step-by-step manner, making it easy for you to learn the topics in no time. 

Exercise 1 (Page – 191)

The first exercise of the chapter has around 17 questions which are very short answer type questions based on the variations that can be seen in different organisms.

Exercise 2 (Page – 192)

This exercise of Chapter 4 – Heredity and Evolution has around 21 questions which are short answer type questions. Practising these questions will help you clear your concepts.

Exercise 3 (Page – 192)

Exercise 4.3 of Lakhmir Singh Solutions for Class 10 Biology Chapter 4 consists of a total of 12 questions which are long answer type questions. Practising these questions will help you in preparing for your CBSE exams well.

Exercise 4 (Page – 193)

Exercise 4 of Lakhmir Singh Solutions for Chapter 4 consists of 28 questions that are multiple-choice questions.

Exercise 5 (Page – 194)

This is the last exercise of the chapter and has around 15 questions that are based on high order thinking.

All the rest of the exercises consist of more than 50 questions related to other topics in the chapter. With the solutions provided by Instasolv, you can now do a complete revision of Chapter 4 – Heredity and Evolution before the exams.

Benefits of Lakhmir Singh and Manjit Kaur Solutions for Class 10 Biology Chapter 4 – Chemical Heredity and Evolution

  • All the solutions are based on the latest syllabus released by NCERT and majorly cover all the topics of the chapters in a well-structured format.
  • The Lakhmir Singh and Manjit Kaur Solutions for Class 10 Biology help you in scoring high marks in the Board Exam. 
  • The solutions are developed by qualified experts who are well-versed with the different techniques of teaching.
  • Our experts have provided a detailed explanation and step by step procedure of solving the questions.
  • Covering all the important topics of the chapters in systemic order is one of the major benefits this Lakhmir Singh Solutions for Class 10 Biology provides to you.

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