Mechanisms of Genetics
A parent plant is heterozygous (Tt) for height. What percentage of offspring will be short (tt)?
What is 25%?
A graph shows an increase in light intensity leads to increased oxygen production in a plant. What process is occurring?
What is photosynthesis?
A population of insects becomes resistant to pesticides over time. What explains this change?
What is natural selection?
A food web shows plants → rabbits → foxes. If rabbits decrease, what happens to foxes?
What is the fox population decreases?
A mutation improves an organism’s survival in its environment. What will likely happen over time?
What is the trait becomes more common?
A mutation changes a DNA sequence but does not change the amino acid produced. What type of mutation is this?
What is a silent mutation?
A cell placed in a salt solution shrinks. What happened?
What is water moved out of the cell (osmosis)?
Two species have similar bone structures but different functions. What does this suggest?
What is common ancestry?
This is the role of an organism in its environment.
What is a niche?
A student observes that a cell cannot maintain homeostasis due to membrane damage. Which function is affected?
What is regulation of materials in/out of the cell?
A student crosses two heterozygous parents (Bb x Bb). The offspring show a 3:1 phenotype ratio. What does this demonstrate?
What is Mendelian inheritance (law of segregation)?
This process maintains internal balance in an organism.
What is the homeostasis?
This type of structure has a similar function but different evolutionary origins.
What are analogous structures?
An invasive species outcompetes native species for resources. What will likely occur?
What is native population decreases?
A plant fails to grow due to lack of sunlight. Which two processes are directly affected?
What are photosynthesis and energy production?
A gene is located on the X chromosome. Males are more likely to express the trait. Why?
What is because males have only one X chromosome?
An enzyme stops functioning after being exposed to high heat. Why?
What is denaturation (change in enzyme shape)?
Fossil evidence shows gradual changes in a species over millions of years. What does this support?
What is evolution over time?
Nitrogen-fixing bacteria are removed from soil. What happens to plant growth?
What is plant growth decreases?
A genetic disorder affects hemoglobin, reducing oxygen transport. Which body system is impacted AND what is the genetic cause?
What is circulatory system and mutation in DNA?
This process produces gametes with half the number of chromosomes.
What is meiosis?
A student observes that cells with more mitochondria produce more energy. What conclusion can be made?
What is mitochondria increase ATP production?
A small group becomes isolated from a larger population and evolves differently. What is this called?
What is speciation?
A drought reduces water availability in an ecosystem. Which organisms are most affected first?
What are producers?
Data shows a population crash after a disease spreads. Some individuals survive due to genetic resistance. What two concepts explain this?
What are genetic variation and natural selection?