f. What is meant by genetic drift ? Explain genetic drift citing the example of founder effect
A. The change in the frequency of a gene that occurs merely by chance and hot by selection in small populations, is called genetic drift er Seqll Wright effeet.
* A gene is with two alleles, the frequency of a particular gene is 1\%. The probability of losing that allele by chance from the small population is more. The end result is either fixation or loss of that allele.
* Founder effect : If a small group of individuals from a population start a new colony in an isolated region, those individuals are called the founders of the new population. The allelic frequencies of their descendants are similar to those of the founders rather than to their ancestral parent population.
* Ex: Presence of O+ve blood group nearly 100% of the Red Indians. The forefathers of the Bed Indian tribe were predominently O+vo and they isolated themselves reproductively from other populations.

Question

f. What is meant by genetic drift ? Explain genetic drift citing the example of founder effect
A. The change in the frequency of a gene that occurs merely by chance and hot by selection in small populations, is called genetic drift er Seqll Wright effeet.
* A gene is with two alleles, the frequency of a particular gene is 1\%. The probability of losing that allele by chance from the small population is more. The end result is either fixation or loss of that allele.
* Founder effect : If a small group of individuals from a population start a new colony in an isolated region, those individuals are called the founders of the new population. The allelic frequencies of their descendants are similar to those of the founders rather than to their ancestral parent population.
* Ex: Presence of O+ve  blood group nearly 100% of the Red Indians. The forefathers of the Bed Indian tribe were predominently O+vo and they isolated themselves reproductively from other populations.

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Question Text	f. What is meant by genetic drift ? Explain genetic drift citing the example of founder effect A. The change in the frequency of a gene that occurs merely by chance and hot by selection in small populations, is called genetic drift er Seqll Wright effeet. * A gene is with two alleles, the frequency of a particular gene is 1\%. The probability of losing that allele by chance from the small population is more. The end result is either fixation or loss of that allele. * Founder effect : If a small group of individuals from a population start a new colony in an isolated region, those individuals are called the founders of the new population. The allelic frequencies of their descendants are similar to those of the founders rather than to their ancestral parent population. * Ex: Presence of $O^{+ve}$ blood group nearly $100%$ of the Red Indians. The forefathers of the Bed Indian tribe were predominently $O^{+ vo}$ and they isolated themselves reproductively from other populations.
Updated On	Mar 23, 2023
Topic	Genetics and Evolution
Subject	Biology
Class	Class 12
Answer Type	Video solution: 1
Upvotes	116
Avg. Video Duration	12 min

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