Mendel's law of Independent Assortment states that genes located on different chromosomes are inherited independently of each other. However, this law does not fully apply to genes that are located closely on the same chromosome, as these genes are likely to be inherited together due to their physical proximity. This concept is known as genetic linkage, which can cause linked genes to be inherited together, thereby deviating from independent assortment. In the given assertion and reason:
Assertion (A): Mendel’s law of Independent assortment does not hold good for the genes that are located closely on the same chromosome. This statement is true because linkage affects the inheritance pattern of closely located genes on a chromosome.
Reason (R): Closely located genes assort independently. This statement is incorrect because closely located genes are often inherited together due to linkage, which contradicts the concept of independent assortment.
Therefore, the correct response is: (A) is correct but (R) is not correct.
A bob of heavy mass \(m\) is suspended by a light string of length \(l\). The bob is given a horizontal velocity \(v_0\) as shown in figure. If the string gets slack at some point P making an angle \( \theta \) from the horizontal, the ratio of the speed \(v\) of the bob at point P to its initial speed \(v_0\) is :
A full wave rectifier circuit with diodes (\(D_1\)) and (\(D_2\)) is shown in the figure. If input supply voltage \(V_{in} = 220 \sin(100 \pi t)\) volt, then at \(t = 15\) msec:
If two genes were present on the same chromosome, the chances of getting a parental combination were much higher in the next generation in comparison to the non-parental combination. This physical association of genes was termed ‘linkage’. The description of the non-parental gene combinations in a dihybrid cross is termed ‘genetic recombination'. After the discovery of linked genes, the frequency of linked genes also influenced the appearance of traits in the next generation.
Read More: Chromosomal Theory of Inheritance