Recent questions tagged ch5

How was it concluded that genes are located on the chromosomes?

asked Jul 5, 2017 by pady_1

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Define aneuploidy. How is it different from polyploids? Describe the individuals having the followin

asked Jul 5, 2017 by pady_1

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a) In humans, males are heterogametic  and female are homogametic. Explain. Are there any examp

asked Jul 4, 2017 by pady_1

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Discuss in detail the contributions of Morgan and Sturtvant in the area of genetics.

asked Jul 4, 2017 by pady_1

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Discuss why Drosophila has been used extensively for  genetical studies?

asked Jul 4, 2017 by pady_1

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If a father and son are both defective in red - green colour vision, is it likely that the son inher

asked Jul 4, 2017 by pady_1

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A plant with red flowers was crossed with another plant with yellow flowers. If $F_1$ showed all flo

asked Jul 4, 2017 by pady_1

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What is Down's syndrome? Give its symptoms and cause. Why is it the chances of having a child with D

asked Jul 4, 2017 by pady_1

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How does a mutagen induce mutation? Explain with an example.

asked Jul 4, 2017 by pady_1

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In our society a woman is often blamed for not bearing a male child. Do you think is it right? Justi

asked Jul 3, 2017 by pady_1

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For the expression of traits genes provide only the potentially and the environment provides the opp

asked Jul 3, 2017 by pady_1

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In a monohybrid cross of plants with red and white flowered plants, Mendel got only pink flowered pl

asked Jul 3, 2017 by pady_1

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Why is the frequency of red green colour blindness is many times higher in males than in females?

asked Jul 3, 2017 by pady_1

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What are the characteristics of a true breeding line?

asked Jul 3, 2017 by pady_1

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How alleles of a particular gene are differ from each other? Explain its significance.

asked Jul 3, 2017 by pady_1

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In a Mendelian monohybrid cross, the $F_1$ generation shows identical genotypic and phenotypic ratio

asked Jul 3, 2017 by pady_1

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A person has to perform crosses for the purpose of stdying inheritance of a few traits / characters.

asked Jun 30, 2017 by pady_1

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Enlist the steps of controlled cross pollination. Would emasculation be needed in a cucurbit plant?

asked Jun 30, 2017 by pady_1

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Even if a character shows multiple allelism, can individuals will have two alleles for that characte

asked Jun 30, 2017 by pady_1

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Discuss the genetic basic of wrinkled phenotype of pea seed.

asked Jun 30, 2017 by pady_1

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Genes contains the information that is required to express a particular trait. Explain.

asked Jun 30, 2017 by pady_1

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In order to obtain the $F_1$ generation, Mendel pollinated pure - breeding tall plant with a pure br

asked Jun 30, 2017 by pady_1

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Do you think Mendel's law of Inheritance would have been different if the characters that he chose w

asked Jun 30, 2017 by pady_1

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What is the cross between the progeny of F1 and the homozygous recessive parent called? How is it us

asked Jun 30, 2017 by pady_1

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Differentiate w.r.t. $x$ the function in $x^x + x^a +a^x+a^a$, for some fixed $a> 0$ and $x>0$

asked Dec 8, 2016 by priyanka.c

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Find the value of 'a ' so that the function f(x) is defined by $f(x) = \begin{cases} \frac{\sin ^2 a x}{x^2} & x \neq 0 \\ 1 , & x =0 \end{cases}$ may be continuous at x = 0

asked Nov 22, 2016 by priyanka.c

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Verify Rolle's theorem for $f(x) = x^2 + 2$ in the interval [-2,2]

asked Nov 21, 2016 by priyanka.c

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differentiate $y = (\sin x)^x + \sin^{-1} \sqrt x$

asked Nov 21, 2016 by priyanka.c

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Find the value of k if f(x) is continuous at $x = \frac{\pi}{2}$, when $f(x) =\begin{cases}\frac{k \cos x}{\pi - 2x }\;;\; x \neq \frac{\pi}{2} \\ 3 ,\; \; \; \; \; \; \; \; \; x = \frac{\pi}{2} \end{cases}$

asked Nov 20, 2016 by priyanka.c

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Differentiate $a^x$ w.r.t x, where a is a constant

asked Nov 16, 2016 by priyanka.c

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It is given that a function $f{x} = x^3 - 6x^2 + ax+ b $ on [1,3] , Rolle's theorem holds with $c = 2 + \frac{1}{\sqrt3}$. Find the value of a and b if f(1) = f(3) = 0

asked Nov 10, 2016 by priyanka.c

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How many right angles do you make if you start facing south and turn clockwise to west?

asked Aug 2, 2016 by meena.p

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Find the number of right angles turned through by the hour hand of a clock when it goes from 1 to 10.

asked Aug 2, 2016 by meena.p

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Find the number of right angles turned through by the hour hand of a clock when it goes from 3 to 6.

asked Aug 2, 2016 by meena.p

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Where will the hand of a clock stop if it starts at $2$ and makes $\large\frac{1}{2}$ of a revolution, clockwise?

asked Aug 2, 2016 by meena.p

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Where will the hand of a clock stop if it starts at $2$ and makes $\large\frac{1}{4}$ of a revolution, clockwise?

asked Aug 2, 2016 by meena.p

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A body is moving down a long inclined plane of angle of inclination $\theta$ . The coefficient of friction between the body and the plane varies as $\mu =0.5 \;x$ Where x is the distance moved down the plane . The body will have the maximum velocity when it has travelled a distance x given by

asked Aug 29, 2014 by meena.p

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A body is sliding down a rough inclined plane of angle of inclination $\theta$ for which the coefficient of friction varies with distance x as $\mu (x)=kx$, where k is a constant . Here x is the distance moved by the body down the plane . The net force on the body will be zero at a distance $x_0$ given by :

asked Aug 29, 2014 by meena.p

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Two blocks of masses $m_1=5 \;kg$ and $m_2= 6\;kg$ are connected by a light string passing over a light friction less pulley as shown in fig. The mass $m_1$ is at rest on the inclined plane and mass $m_2$ hangs vertically . If the angle of incline $\theta =30^{\circ}$, What is the magnitude and direction of the force of friction on the $5\;kg$ block . Take $g= 10 ms^{-2}$

asked Aug 29, 2014 by meena.p

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A uniform sphere of radius R and mass M is held at rest on an inclined plane of angle $\theta$ by a horizontal string , as shown in the figure. Let $R= 20 \;cm,M= 3\;kg,$ and $ \theta= 30^{\circ}$. What is the normal force exerted on the sphere by the inclined plane ?

asked Aug 28, 2014 by meena.p

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An $8.0\;kg$ box is released on a $30^{\circ}$ inclined and accelerates down the incline at $30\;m/s^2$ Find the frictional force impending its motion . How large is the coefficient of friction in this situation ?

asked Aug 28, 2014 by meena.p

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A $12-kg$ box is released from the top of an inclined that is $5.0\;m$ long and makes an angle of $40^{\circ}$ to the horizontal. A $60-N$ friction force impedes the motion of the box. How long will it take to reach the bottom of the incline ?

asked Aug 28, 2014 by meena.p

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Suppose A box has a mass of $100\; kg$, and you have to move it up a ramp. The ramp has an angle of $23^{\circ}$. What is the force needed to get the box moving up the ramp if the coefficient of static friction is $0.20$?

asked Aug 28, 2014 by meena.p

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A right triangular wedge of mass M and inclination angle $\theta$ , supporting a small block of mass m on its side, rests on a horizontal frictionless table, as shown in figure. Assuming all surfaces are frictionless, What horizontal force F must be applied to the system to achieve this result?

asked Aug 28, 2014 by sreemathi.v

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Two blocks of masses $m_1=m$ and $m_2=2m$ are connected by a light string passing over a frictionless pulley.The mass $m_1$ is placed on a smooth inclined plane of inclination $\theta=30^{\large\circ}$ and mass $m_2$ hangs vertically as shown in figure below.If the system is released the tension in the string is

asked Aug 28, 2014 by sreemathi.v

1 answer

Two blocks of masses $m_1=m$ and $m_2=2m$ are connected by a light string passing over a frictionless pulley.The mass $m_1$ is placed on a smooth inclined plane of inclination $\theta=30^{\large\circ}$ and mass $m_2$ hangs vertically as shown in figure below.If the system is released,the blocks move with an acceleration equal to

asked Aug 28, 2014 by sreemathi.v

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A box can be moved up an inclined plane with constant velocity by a force of magnitude $F_1$ or down the inclined plane with constant velocity by a force of magnitude $F_2$ . Find the coefficient of kinetic friction $\mu_k$ between the box and the inclined plane. It holds that $F_1=6F_2$ and both forces are parallel with the inclined plane. The angle $\alpha$ between the inclined plane and the horizontal plane is $15^{\circ}$

asked Aug 27, 2014 by meena.p

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A 15 N force is applied to a $6.0\;kg$ block. Determine the acceleration of the block.

asked Aug 27, 2014 by meena.p

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A block of mass M is resting on an inclined plane as shown in figure below.The inclination of the plane to the horizontal is gradually increased.It is found that when the angle of inclination is $\theta$ the block just begins to the slide down the plane.What is the minimum force F applied parallel to the plane that would just make the block move up the plane?

asked Aug 27, 2014 by sreemathi.v

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Determine the rate of deceleration of $7.0 \;kg $ block sliding up an incline angled at $35^{\circ}$ to the horizontal. Assume that the coefficient of friction is $0.45$

asked Aug 27, 2014 by meena.p

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