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Subjects

Science

Heredity and Evolution

आनुवंशिकता और विकास

Class 10 Science Chapter Heredity and Evolution explains how traits are passed from parents to offspring through inheritance. It introduces Mendel’s laws and the role of genes in determining characteristics, including sex determination in humans. The chapter also explores evolution as the gradual change in populations over generations and describes how variation and isolation can lead to the formation of new species.

1

Inheritance

आनुवंशिकता

Inheritance is the process through which traits are passed from parents to their offspring. In this Class 10 Science topic from the chapter Heredity and Evolution, students learn how genes located on chromosomes carry information, how alleles influence features, and how dominant and recessive traits are expressed. They explore Mendel’s experiments using pea plants, understand inherited traits and variations, and see how differences among organisms provide a foundation for studying evolution.

28 questions
2

Mendel’s laws

मेंडल के आनुवंशिकता के नियम

In Class 10 Science, this topic explains how Gregor Mendel’s experiments with pea plants revealed basic patterns of heredity. Students learn how traits are controlled by pairs of factors, now understood as alleles, and study dominance, segregation, and independent assortment. They use simple genetic crosses and Punnett squares to predict possible offspring combinations, distinguish genotype from phenotype, and connect inherited variation with the broader ideas of heredity and evolution.

28 questions
3

Sex determination

लिंग निर्धारण

In this Class 10 Science topic from the chapter Heredity and Evolution, students learn how sex is determined in humans through sex chromosomes. They examine the XX pattern in females and XY pattern in males, and understand that eggs carry an X chromosome while sperm may carry an X or Y chromosome. This explains why the chromosome contributed by the father determines the usual biological sex pattern, while also connecting chromosome inheritance to heredity and correcting the misconception that a child’s sex is caused by the mother.

25 questions
4

Evolution and speciation

जैविक विकास और प्रजाति-निर्माण

In this Class 10 Science topic from Heredity and Evolution, students explore how inherited variations accumulate over generations and contribute to the evolution of organisms. They learn how natural selection, environmental changes, and reproductive isolation can lead to the formation of new species, or speciation. The topic also connects fossils, similarities among organisms, and other evidence to the scientific understanding of evolutionary relationships and biodiversity.

34 questions