Scenario's of natural selection
If a animal is struggling to reach food high up how may it adapt to it's environment to reach it?
what is natural selection?
Differential survival and reproductive success among a group of organisms due to differences in the inherited traits or characteristics of the organisms
why may a bird have a different beak even If a similar species bird has a completely different beak
because their beaks are made to suit their enviornment
is genetic drift purposefully?
no it's all accidental
what is gene flow?
Gene flow is when individuals migrate into and out of a population. It can also be called “gene migration” because the genes are being transferred from one area to another.
A mutation may occur and if the mutation is helpful and the organism reproduces future descendants may keep the mutation
what is a adaptation?
A process by which the heritable characteristics of a population change such that the organisms in the population become better able to survive and reproduce in their environment
if the dad lizard has a long tail but the mom has a short tail what is the process that allows the infant lizard to have his dad's long tail
crossing over
are smaller or larger populations at higher risk once genetic drift happens
smaller as one tiny change can make a huge change in the enviornment
what is gene flow also known as?
gene migration
Why can natural selection only happen if an organism reproduces sexually
what is a mutation?
A change in the DNA sequence of a chromosome
why may some giraffes have longer necks than another giraffe
because their neck is better adapted for their environment for example if their food was higher up than the other giraffe
what is genetic drift?
Genetic drift is a random, accidental change in the allele frequency in a population. Unlike gene flow, the change in a population’s allele frequency is due to a sudden elimination of a particular gene.
can gene flow increase or decrease the allele frequency in a area
If a lizard species is struggling in it's environment what type of mutations may allow it to survive and reproduce
a mutation on the skin allowing the lizard to camouflage into it's environment
what is a population?
All of the organisms of one species within a particular ecosystem
why may a fish's tail be different from a similar species fish's tail
because it allows the fish to swim faster to possibly get away from predators quicker
The bottleneck effect occurs when a large population is suddenly reduced to a small number and only a few individuals survive
if bee's carry pollen from their population over to another population would this increase or decrease the allele frequency in the area?
in this scenario it would bring a increase of allele frequency to this area
if a turtle was struggling in it's environment because of the turtle struggling to lay eggs because of the strong current what mutations may take place in order to help the turtle reproduce?
tougher legs to swim through the current
what is a phenotype?
The physical expression of a gene or set of genes; the appearance of an organism
if a kangaroo had gotten a mutation that made it's pouch bigger but later it got a infection and died however it still reproduced what may happen as a result of that?
the future generations may have the mutation and will suffer until it no longer has the mutation and carries on living or it can go extinct
what is the flounder effect?
The founder effect occurs when a small group of individuals separates from a larger population and establishes a new population in a new area.
if a group of black tigers left the savanha what would the next group of tigers color be?
anything except black