$^{\prime} XX ^{\prime}$ is a type of selection process in evolution $^{\prime} XX ^{\prime}$ promotes the population changes in one particular direction $^{\prime} XX ^{\prime}$ favours small or large sized individuals, mean size of population changes in $^{\prime} XX ^{\prime}$. Identify $^{\prime} XX^{\prime}$
Stabilizing selection
Directional selection
Disruptive selection
None of these
Genetic drift operates in
''Migration may enhance or blurr the effects of selection''. Comment.
In a species, the weight of newborn ranges from $2$ to $5\; \mathrm{kg} .97 \%$ of the newbom with an average weight between $3$ to $3.3\; \mathrm{kg}$ survive whereas $99 \%$ of the infants born with weights from $2$ to $2.5\; \mathrm{kg}$ or $4.5$ to $5 \;kg$ die. Which type of selection process is taking place?
What is founder effect ?
According to Hardy-Weinberg principle, allele and genotype frequencies in a population will remain constant from generation to generation in the absence of other evolutionary influences. It makes several assumptions which were given below.
$i.$ Random Mating
$ii.$ Sexual Reproduction
$iii.$ Non-overlapping Generations
$iv.$ Occurrence of Natural Selection
$v.$ Small size of population
Identify two assumptions which do not meet for a population to reach Hardy-Weinberg Equilibrium?