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Yogita Ingle 6 years, 3 months ago
Linkage
Morgan noted that while crossing a set of characters, two genes did not follow Mendel’s law as they did not divide as per the law. The likelihood of achieving a parental combination if two genes are situated on the same chromosome was relatively higher in the subsequent generation in comparison to the non-parental combination. The physical connection of genes was referred to as linkage.
Genes are said to be linked when genes for different traits are located in similar chromosome and hence are tied to each other. It is a deviation from the Mendelian principle of independent assortment that is appropriate to be applied to the genes that are situated on different chromosomes.
The term genetic recombination described the non-parental gene combinations in a dihybrid cross.
Genetic Recombination
When genetic material is exchanged between two different chromosomes or between different regions of the same chromosome, it is known as genetic recombination. It is observed in both eukaryotes and prokaryotes. It increases the genetic diversity of the sexually reproducing organisms.
Nishu Goyal 6 years, 3 months ago
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Yogita Ingle 6 years, 3 months ago
Coulomb’s Law is formula or quantitative aspect of electricity which gives an idea about force between two point charges. By the word point charge, we mean that in physics, the size of linear charged bodies is very small compared to the distance between them, so we consider them as point charges as it becomes easy for us to calculate the force of attraction/ repulsion between them.
Generally, the statement, let’s say there are two charges q1 and q2. The distance between the charges is ‘r’, and the force of attraction/repulsion between them is ‘F’. Then
F ∝ q1q2
F ∝ 1/r2
F = k q1q2/ r2
where k is proportionality constant and equals to 1/4 π ε0, the symbol ε0 is called epsilon naught and it signifies permittivity of a vacuum.
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Sia ? 6 years, 3 months ago
Given:
Kf = 3.83 K kg mol-1
Mass of solute = 2.56 gt
Mass of solvent = 100 g
Therefore,
Molality of the solution, {tex}m=\frac{2.56}{32} \times \frac{1000}{100}=0.8 m{/tex}
The depression in freezing point of a solution is given as
{tex}\Delta \mathrm{Tf}{/tex} = iKfm
0.383 = i {tex}\times{/tex}3.83 {tex}\times{/tex} 0.8
i = {tex}\frac {1} {8}{/tex}
Hence, 8 sulphur atoms are undergoing association, as shown below:
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Sia ? 6 years, 3 months ago
The Principal
Mountview Public School
Kalka, New Delhi
11th February, 20XX
The Chairperson
Education for All
New Delhi
Respected Madam,
Subject: Funds required for replacement of blackboards
I, as both a citizen and the Principal of the school run by your NGO, appreciate the efforts that your NGO is taking to educate the children of the deprived sections of the society. Our school will soon be celebrating it's tenth anniversary. As the Principal, I realise that the school needs some fixtures. The most urgent one needed at present is the replacement of the blackboards in the classrooms. The blackboards are either damaged, worn out or totally unusable. I suggest that we should replace them with permanent whiteboards, as these are more durable and can also be used to project slides as well as for using audio-visual teaching equipments, as per the necessity in today’s education scenario.
I, thus, request you to release funds for this purpose at the earliest. l am enclosing a quotation with this letter for the whiteboards from a local supplier to help you understand the amount of funds required.
Thanking you!
Yours sincerely,
Shweta Pandit
Principal
Enclosed : Quotation
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Ashish Singh 6 years, 3 months ago
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