Combination of thin lenses in contact
Let us consider two lenses A anb B of focal length f₁ and f₂ placed in contact with each other. […]
Refraction of light at a spherical surface
Refraction of light at a convex surface :- 1. For real image :- The figure shows the geometry of formation
Exceptions to Mendel’s laws : Incomplete dominance, Co-dominance and Linkage
1. Incomplete dominance :- It is a post Mendelian discovery. In the case heterozygous condition of gene results in intermediate
Exceptions to Mendel’s laws : Incomplete dominance, Co-dominance and Linkage Read Post »
Mendel’s laws of inheritance and Chromosomal theory of inheritance
Mendel’s laws of inheritance :- Mendel’s present his paper on principles of heredity at the annual conventy on natural history
Mendel’s laws of inheritance and Chromosomal theory of inheritance Read Post »
Monohybrid cross and the Punnet square
Monohybrid cross :- Monohybrid is the cross involves one character and single gene pair.It leads to monohybrid offspring in F₁
Dihybrid cross
It is a cross which involves two characters and two gene pair. it leads to dihybrid F₁ offspring. Mendel worked
Definitions of some technical terms used in Mendel’s experiments ( Allele , Pleiotrophic gene , Genotype , Phenotype and more)
Allele or Allelomorph :- Genes which code for a pair of contrasting traits are known as alleles, i.e. They are
Genetics, Heredity, Gene and Reasons for Mendel’s success
Genetics :- Genetics is the branch of biology concerned with the study of genes, genetic variation and heredity in organisms.
Genetics, Heredity, Gene and Reasons for Mendel’s success Read Post »
न्यूक्लिक अम्ल तथा उसका प्रकार, न्युक्लियोसाइड तथा न्युक्लियोसाइड, डीएनए (DNA) की संरचना तथा उसका प्रकार का वर्णन।
न्यूक्लिक अम्ल (Nucleic acid) :- कोशिका के न्यूक्लियस में क्रोमोसोम के अंदर उपस्थित आनुवंशिक पदार्थ को न्यूक्लिक अम्ल कहते हैं।
RNA : Structure , Types , Differences between RNA and RNA
RNA and its structure :- RNA molecules are single stranded nucleic acids composed of nucleotides. Fig. 1. Structure of (
RNA : Structure , Types , Differences between RNA and RNA Read Post »
Atmospheric refraction : Twinkling of stars, Apparent time of Sunrise and sunset
Twinkling of stars :- it is is a phenomenon of atmospheric refraction. Stars do not really twinkle they just appear
Atmospheric refraction : Twinkling of stars, Apparent time of Sunrise and sunset Read Post »
Total internal reflection and its applications : Mirage, Diamond, Prism and Optical fibre
Total internal reflection :- when light travels from and optically denser medium to rarer medium at the interface, it is