DNA
This molecule has a double helix structure made up of nucleotides.
What is DNA?
The physical expression of an organism’s genes.
What is phenotype?
The scientist who proposed natural selection.
Who is Charles Darwin?
The variety of life forms in an ecosystem.
What is biodiversity?
A square frame used to sample plants in an ecosystem.
What is a quadrat?
The base adenine pairs with this base.
What is thymine?
An allele that masks the effect of another.
What is a dominant allele?
A change in allele frequency in a population over generations.
What is evolution?
The total number of species in an area.
What is species richness?
A method used to estimate animal population size by capturing, marking, and recapturing.
What is mark-recapture? (Lincoln Index)
The process where DNA is copied before cell division.
What is DNA replication?
When both alleles are expressed equally in the phenotype (like ABO blood groups).
What is codominance?
Similar structures in different species that share a common ancestor are called ___.
What are homologous structures?
A formula that accounts for both species richness and evenness.
What is the Simpson’s Diversity Index?
This type of sampling is used along a line to show changes across an environmental gradient.
What is a transect?
Proteins called ___ help DNA coil tightly in chromosomes.
What are histones?
This principle states that alleles for different traits segregate independently.
What is the law of independent assortment?
Random changes in a population’s gene pool due to chance, often in small populations.
What is genetic drift?
This factor describes how evenly individuals are spread among species.
What is species evenness?
The number of organisms per unit area.
What is population density?
This technique separates DNA fragments by size using an electric current.
What is gel electrophoresis?
A diagram showing possible gamete combinations in offspring.
What is a Punnett square?
The process where unrelated organisms evolve similar traits due to similar environments.
What is convergent evolution?
Site A has an SDI of 0.82 and Site B has an SDI of 0.35. Which site has higher biodiversity, and why?
What is Site A, because the SDI value is closer to 1, showing greater richness and evenness?
The maximum population size an environment can sustainably support.
What is carrying capacity?