List - I | List – II | ||
A. | Gene pool | i. | Stable within a generation |
B. | Genetic drift | ii. | Change in gene frequency by chance |
C. | Gene flow | iii. | Transfer of genes into or out of population |
D. | Gene frequency | iv. | Total number of genes and their alleles |
A. Gene pool: A gene pool represents the total number of genes and their alleles present in a population. A-IV
B. Genetic drift: Genetic drift refers to random fluctuations in allele frequencies within a population due to chance events. This can lead to the loss of some alleles and the fixation of others. B-II
C. Gene flow: Gene flow is the transfer of genetic material (genes) between populations through migration. C-III
D. Gene frequency: Gene frequency refers to the proportion of a particular allele within a population. This frequency can be stable within a generation but can change across generations due to evolutionary forces. D-I
Proteins control the expression of various characters. Explain this statement by taking an example of "tallness" as a characteristic in plants
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 :