(2)1. What is shown in the following figure? If you have birds with this phenoty
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(2)1. What is shown in the following figure? If you have birds with this phenotypic trait then what, specifically is happening with the population? Phenotypic trait (2) 2. What is shown in the following figure? This pattern has been seen in humans. What specifically has changed in humans following this trend (Hint: Look at the lecture)? Phenotypic trait (2) 3. What is shown in the following figure? There was a terrible drought in the Galapagos Islands the year after the initial data were collected here. What trait of the birds is likely depicted in this figure? Phenotypic traitExplanation / Answer
answer 1- the population is under disruptive selection, in which genes with extreme effects to either end are selected over stabilized genes for better adaption. graph peaks move towards extreme limits.
answer 2- this is an example of stabilizing selection in which most stabilized trait is selected over extreme traits and peaks are shifted towards the center or median value. birth weight is an example of stabilizing selection in humans. small babies can lose energy easily in form of heat whereas, large sized babies can create complications in pregnancy thus medium sized babies are selected.
answer 3- this is an example of directional selection in which one particular trait is selected over others in one direction, peak shifts towards either end. birds which can survive without water or require less water for growth got selected. another example is peppered moth during the industrial revolution.
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