Inheritance Class 10 Notes

Important Complete Notes on Chapter No.15: Biology Class 10 Chapter 6 Notes written by Professor Mr. Adnan Haider. These computerized notes are very helpful in the preparation of Support and Movement Class 10 Notes for Biology Class 10 Chapter 6 Notes of the 10th class Biology and these are according to the paper patterns of all Punjab boards.

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• Very Important Multiple Choice Questions (MCQs) with Answers of the Chapter No. 15: Inheritance Class 10 Notes in Biology English Medium Class 10th Punjab Book Boards.
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• What is meant by inheritance?
• How does the DNA of chromosome work?
• Write two points of Watson-crick model of DNA.
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• What is the difference between transcription and translation?
• What is difference between homozygous genotype and heterozygous genotype?
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• DNA is replicated before a cell divides. It is done to make the copies of the chromatids of chromosomes. During replication, DNA double helix is unwound and the two stands are separated, much like the two sides of a zipper. Each stand act as template to produce another strand.
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•  Its nitrogenous bases make pairs with the N-bases' of new nucleotides. In this way, both template strands make new polynucleotide strands in front of them.
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• Write down scientific name of pea plant. How many pea plants were used by Mendel.
• What is meant by monohybrid and dihybrid cross?
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• What will be the genotype and phenotype of plants produced as a result of cross between red flowered and white flowered" four-o-clock" plants?
• What is Difference between Natural selection and Artificial selection?
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• What is the relation of favorable variations with natural selection?
• Write down the bonding between nitrogenous bases in DNA model.
• How biotechnology has helped us in improving the environment?
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• For which purpose checker board is used? What is Test Cross? Why is it needed?
• Write a note on Replication of DNA OR Explain Watson-Crick Model of DNA. OR How does DNA of Chromosome Works? Explain.
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• Who was Mendel? Why Mendel selected pea plant for his experiments? 
• What do you mean by natural selection? Explain it. OR Explain "Mechanism of Evolution - Natural Selection".
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• Genotype and its Types: The specific combination of genes in an individual is known as genotype. It is of two types i.e. homozygous and heterozygous. In order to understand the concept of genotype, let us consider an example trait i.e. albinism (a condition in which normal body pigments are absent). Like other traits, it is also controlled by one pair of genes.
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• We can represent the two alleles of the pair as ‘A’ and ‘a’. Three combinations i.e. genotypes are possible for these two alleles i.e. AA, Aa, and aa. These genotypes can be grouped into two types. The genotype in which the gene pair contains two identical alleles (AA or aa), is called homozygous genotype.
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• The genotype in which the gene pair contains two different alleles (Aa), is called heterozygous genotype. When in the heterozygous condition one allele masks or prevents the expression of the other, it is called the dominant allele. The allele which is not expressed is called recessive.
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•  The dominant alleles are represented by capital letters and recessive alleles by lower case letters. Albinism is a recessive trait i.e. it is produced when both alleles are recessive. In humans, allele ‘A’ produces normal body pigments while allele ‘a’ does not produce pigments.
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• If genotype is AA or Aa, the individual will produce pigments. On the other hand, if genotype is aa, no pigments will be produced and the individual will be albino. In this example, you see that the allele ‘A’ dominates over ‘a’, because in Aa indiviual pigments are produced and the effect of ‘a’ is suppressed by ‘A’.
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• The expression of this genotype in the form of trait (in our example, being albino or having normal pigmentation) is known as the phenotype.
  
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