Selfish Gene Question Set 3

Selfish Gene Question Set 3 - The Selfish Gene Question Set...

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The Selfish Gene Question Set 3 Chapter 8. Battle of the generations 1. What types of resources can parents invest in children? Dawkins says that parents can invest the following in children: Food, effort expended in gathering food, risk undergone in protecting young from predators, energy and time devoted to nest or home maintenance, protection from the elements, and time spent in teaching children. (pp. 123) 2. What does Dawkins suggest as the common currency of all types of investment in offspring? Parental investment is defined as any investment by the parent in an individual offspring that increases the offspring's chance of survival ( and hence reproductive success) at the cost of the parent's ability to invest in other offspring according to Dawkins 3. Why should parents have favorite offspring? There is no pure genetic reason to have favorite offspring because the relatedness to all offspring is 1/2. The optimal strategy is to invest equally in the largest number of children that she can rear to the age when they have children. However there are reasons for a mother to invest unequally in their children; favorites. She should invest in the most promising of producing grandchildren and the ones with the most life investment (older). Example, a runt may need more or less parental investment. The runt may need more investment to equal his brothers or the mother may choose to feed the runt to his brothers or sister or eat him herself to use him to make milk. In a life or death situation a mother may decide to save the older child because he contains more of her life's investment. If she haves to decide on who to feed she may choose the younger offspring because the older is more likely to find its own food. She wants to invest in maximizing her distribution of genes. She wants to invest in maximizing her distribution of genes DS:"A parent should have a favorite if it will result in greater genetic representation in the next generation. This accounts for their choice in a life and death situation (favoring the oldest) and the weaning of an older child (when that child's chances of survival are high after being weaned) in order to care for younger children or a runt.
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4. When should the oldest (or largest) offspring be favored by parents in terms of their investment? The oldest offspring should be favored in a life and death situation- when the child the mother does not choose is bound to die. If the youngest offspring is favored, the mother would have to supply extra resources just to get him to the point that the older offspring was. When she favors the oldest one, she has a much better chance of passing on her genes, since he is older in age. All of her parental investment in the oldest child would have then paid off. 5. When should the youngest (or smallest) offspring be favored?
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Selfish Gene Question Set 3 - The Selfish Gene Question Set...

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