Biology 301 Exam Questions and Verified Answers/Accurate Solutions| New Update Already
Graded A+
polygenic when a single trait is affected by multiple genes; often seen over a large spectrum
(ex.. eye color)
pleiotrophy a single gene affects many rats. (ex. frizzle chicken , a long with change in looks,
changes in metabolism)
epitasis expression of one gene controlled by another ex. mouse hair gene, one controls
color and another controls whether or not color sits on har
codominate intermediate phenotype expressed
genetic drift genetic variation lost due to random variations in mating, fecundity, mortality,
inheritance, not controlled by the environment
bottleneck reduction to number of individuals ex.natural disaster
founder new population founding in a new place that comes from an existing population
directional natural selection population to one of the extremeness; under changing
conditions
stabilizing natural selection more individuals in intermediate phenotype;stable environment
disruptive natural selection to both extremes of phenotypes;patchy environment
allopatric with geographic barrier
,sympatric no geographic barrier
life history schedule of organisms growth, development, reproductions and survival
fecundity number of offspring per reproductive episode
parity number of episodes of reproduction
parental investment time and energy put into child
longevity lifespan of organismss
r selected organisms fast growing, prey, short lifespan, high growth rate, high fecundity,
shorter parity
k selected organisms slow growing, long lifespan, predator, slower age to maturity
principle of allocation energy must be balanced across structure, function and behavior
offspring number vs offspring size negative relationship; more seeds, less size
offspring number vs parental care more offspring, less amount of time for each
fecundity of parental care vs. parental survival larger broods(artificially created) were
slightly malnourished
, growth vs age at maturity and life span determinant: grows until sexually mature
indeterminant: growth continues with age
semel parity one reproductive episode per lifetime
interoparity many reproductive episodes per lifetime
senescence less in fecundity with an increase in mortality
Phenotypic plasticity ability for single phenotype to exhibit multiple phenotypes (can be
controlled by environment)
photoperiod light recognition so organisms that hibernate can come out of it
proximate photoperiod such as day length
ultimate photoperiod bears on organisms fitness
sex ratios number of males and females
allocation of resources balanced between males and females
parthenogenesis formation of diploid offspring; normally when pop. is all female
females larger gamete; more energy into reproduction
males smaller gamete
Graded A+
polygenic when a single trait is affected by multiple genes; often seen over a large spectrum
(ex.. eye color)
pleiotrophy a single gene affects many rats. (ex. frizzle chicken , a long with change in looks,
changes in metabolism)
epitasis expression of one gene controlled by another ex. mouse hair gene, one controls
color and another controls whether or not color sits on har
codominate intermediate phenotype expressed
genetic drift genetic variation lost due to random variations in mating, fecundity, mortality,
inheritance, not controlled by the environment
bottleneck reduction to number of individuals ex.natural disaster
founder new population founding in a new place that comes from an existing population
directional natural selection population to one of the extremeness; under changing
conditions
stabilizing natural selection more individuals in intermediate phenotype;stable environment
disruptive natural selection to both extremes of phenotypes;patchy environment
allopatric with geographic barrier
,sympatric no geographic barrier
life history schedule of organisms growth, development, reproductions and survival
fecundity number of offspring per reproductive episode
parity number of episodes of reproduction
parental investment time and energy put into child
longevity lifespan of organismss
r selected organisms fast growing, prey, short lifespan, high growth rate, high fecundity,
shorter parity
k selected organisms slow growing, long lifespan, predator, slower age to maturity
principle of allocation energy must be balanced across structure, function and behavior
offspring number vs offspring size negative relationship; more seeds, less size
offspring number vs parental care more offspring, less amount of time for each
fecundity of parental care vs. parental survival larger broods(artificially created) were
slightly malnourished
, growth vs age at maturity and life span determinant: grows until sexually mature
indeterminant: growth continues with age
semel parity one reproductive episode per lifetime
interoparity many reproductive episodes per lifetime
senescence less in fecundity with an increase in mortality
Phenotypic plasticity ability for single phenotype to exhibit multiple phenotypes (can be
controlled by environment)
photoperiod light recognition so organisms that hibernate can come out of it
proximate photoperiod such as day length
ultimate photoperiod bears on organisms fitness
sex ratios number of males and females
allocation of resources balanced between males and females
parthenogenesis formation of diploid offspring; normally when pop. is all female
females larger gamete; more energy into reproduction
males smaller gamete
