Although each of the following has a better chance of influencing gene frequenci
ID: 179684 • Letter: A
Question
Although each of the following has a better chance of influencing gene frequencies in small populations than in large populations, which one most consistently requires a small population as a precondition for its occurrence? mutation nonrandom mating genetic drift natural selection gene flow Hybrid offspring do not develop normally and die as embroyos. This is an example of Prezygotic postzygotic Morphospecies Allopatric Sympatric True or False A monophyletic group also called clade or tribe consists of ancestral population only of descendants. On a given evolutionary tree, there are many monophyletic tree True False True or False: If one population or species is a better competitor for shared resources, then the poor competitor may be driven to extinction True False True or False The purpose of the natural selection is to make perfect human beings i.e to make better alleles True False Which is not part of the evolutionary processes? Random Mating Gene flow Genetic drill Mutation Natural Selection Which of the following homology (or)homologies is/are useful to make the phylogenetic trees Genetic homology Developmental homology Structural homology I and II only I only I and III only I and II I, II and IIIExplanation / Answer
Ans 9: c. genetic drift
In a small population , there are more chances of losing some gene due to random sampling within the small population which is called 'genetic drift'.
10. b. Post-zygotic.
Two individuals/organism from different species mate to produce hybrid embryos/zygote. They usually do not develop normally and die prematurely and this is called post-zygotic.
12 true
When there is competition for shared resources, the individual/ organism capable of utilizing the resource to maximum extent wins and the other hand drives the other individual to extinction.
13 false
Natural selection results in better alleles but it cannot be termed as its purpose as it is a random process occurring naturally.
14 a. random mating.
Evolution involves non-random mating.
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