week 4 - altruism and the coefficient of relatedness Flashcards

1
Q

homologous

A

same genes in the same ordr
-each chromosome of a homologous pair contain the same loci

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2
Q

loci

A

positions or sections of DNA located along a chromosome that code for the same genes but the exact information encoded by the gene can be different

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3
Q

how is the sex of a baby determined by the father?

A

sperm carries 50 percent x or y and it is random chance that the gamete will give x or y chromosome
-makes xx to be female and xy to be male

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4
Q

how are men more affected by sex linked traits?

A

men only have one chance to get an unaffected x chromosome, and women have two chances

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5
Q

example of an autosomal recessive trait

A

albinism

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6
Q

example of an autosomal dominant trait

A

huntingtons disease

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7
Q

what is the basic term for meiosis?

A

gamete production

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8
Q

how does meiosis work?

A

main job gamete formation, so it reduces cell from diploid to haploid
-before mitosis

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9
Q

ploidy

A

the number of chromosomes that are present

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10
Q

what is the basic term for mitosis?

A

somatic cell production (everything else is going through this)

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11
Q

how does mitosis work?

A

main job is to produce daughter cells with the exact genetic component of the parent cell
-cell cycle has to happen for mitosis to happen

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12
Q

mendels rule of independent assortment

A

alleles of one gene can segregate (during meiosis) independently of other genes
-the allele that you pass on for one trait (eye color) does not have any affect on the allele you pass on for another trait
-hence the dihybrid cross

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13
Q

what does it mean if a standard deviation is large or small?

A

if its large it means that the data is spread out and not reliable
- if its small it means its most likely accurate

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14
Q

strength of meta study

A

lots of variation and we can have a large and diverse sample size for a large period of time

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15
Q

direct fitness

A

increasing the number of offspring that an individual produces

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16
Q

indirect fitness

A

increasing the number of offspring my relatives produces
-they carry my genes, so i am increasing my fitness indirectly by helping them

17
Q

inclusive fitness

A

the combination of direct and indirect fitness
-related to hamiltons rule

18
Q

what is hamiltons rule?

A

B . R - C > 0

b = benefit to the relative
r = coefficient of relatedness
c = cost to me

19
Q

apparent kindness

A

situations in which we expect the kind act to occur
- the more kin an animal is more likely to have near, the more it will act altruistically

20
Q

how to find the coefficient of relatedness?

A
  1. every connection between a parent and their offspring is .5
  2. find every way two individuals could have inherited the same allele from an ancestor
  3. for each path, calculate the probability
  4. add the probability for all possible parts
21
Q

how does kin recognition occur? (three ways)

A
  1. spatial recognition (treat those around you as kin)
  2. social association (treat those that you remember from childhood as kin)
  3. phenotype matching (treat those who resemble you as kin)
22
Q

behavior

A

encompasses the actions performed by an organism, often in response to its environment or the actions of another organism

23
Q

innate behavior

A

also known as instinct behavior
- behavior that does not require any environmental input to develop
- present in all individuals from a population and doesnt vary much

24
Q

fixed action pattern

A

a sequence of behaviors triggered in response to a specific signal called a sign stimulus

25
Q

example of fixed action pattern

A

egg retrieval is in geese
-when a goose spots an egg outside its nest it rolls it back to the nest, keeping the egg tucked underneath its bill
-goose continues the side to side motion, even if egg gets taken away to the nest

26
Q

learned behavior

A

behaviors that are acquired and modified overtime in response to the individuals experiences
-ease of learning can vary upon individuals
-certain behaviors are less likely learned

27
Q

maladaptive behavior

A

when an individual does something that is not the optimal choice for fitness

28
Q

reciprocal altruism

A

when repeated interactions happen, we expect more and more altruistic behavior

29
Q

how to increase reciprocal altruism

A
  1. increase the amount of times you interact with the person
  2. minimize the perception of what the cost is going to be
  3. increasing perception of what the benefit to the recipient is going to be