MOLECULAR GENETICS
This three-part monomer of a nucleic acid is structurally composed of a pentose sugar, a phosphate group, and a variable nitrogenous base.
What is a nucleotide?
This cell division pathway involves a single division step and is explicitly leveraged by multicellular organisms for somatic growth and tissue repair.
What is mitosis?
This term describes the observable physical traits or structural presentation of an organism, which is determined by its underlying genotype.
What is a phenotype?
This laboratory technique uses an electrical field to separate macromolecular fragments through an agarose matrix based on size and charge.
What is gel electrophoresis?
These behaviors are genetically pre-programmed, developmentally fixed, and executed flawlessly by an animal from birth without any prior trial-and-error exposure.
What are innate behaviors?
The process occurring inside the nucleus where RNA polymerase reads a template strand of DNA to build a single-stranded mRNA intermediate.
What is transcription?
This term describes an organism’s underlying genetic allele combination, typically represented mathematically using pairs of letters like "Gg" or "pp".
What is a genotype?
For natural selection to act upon a population, the group must exhibit this trait, which arises naturally via random mutations and crossing over.
What is genetic variation?
These specialized biochemical enzymes scan genomes and cleave the sugar-phosphate backbone at highly specific nucleotide target sequences.
What are restriction enzymes?
A horse learning to completely ignore the harmless but loud sound of passing highway traffic over time is an example of this specific behavioral adaptation.
What is habituation?
These sequence base triplets on an mRNA strand are systematically read by ribosomes to determine the precise linear arrangement of amino acids.
What are codons?
These specialized haploid reproductive cells, such as sperm and eggs, are the direct structural products of meiotic division.
What are gametes?
Favorable, heritable variations that increase an organism's probability of surviving local selective pressures and successfully reproducing.
What are adaptations?
In an empirical study tracking how historical surges in clinical antibiotic administration cause shifts in bacterial resistance, the antibiotic usage represents this specific variable.
What is the independent variable?
These volatile chemical signals are released by animals into their surrounding environment to communicate territorial boundaries, mark trails, or attract distant mates.
What are pheromones?
The specific cytoplasmic organelle where transfer RNA (tRNA) molecules match their anticodons to incoming mRNA transcripts to assemble a protein.
What is a ribosome?
If an individual inherits one dominant allele and one recessive allele for a trait (such as "Pp"), its genetic state is classified as this.
What is heterozygous?
This specific type of phylogenetic branching diagram illustrates evolutionary relationships among clades based on shared derived characteristics.
What is a cladogram?
This specific style of data visualization is most effective when researchers need to plot continuous numerical data trends over a sequential chronological timeframe.
What is a line graph?
This rapid and generally irreversible form of learning can occur only during a highly restricted, early developmental phase known as the critical period.
What is imprinting?
Utilizing a standard circular genetic codon chart, an mRNA sequence read from 5' to 3' as the triplet GUG will code for this specific amino acid.
What is Valine?
These regulatory cell cycle control mechanisms continuously verify DNA integrity and proper replication before allowing a cell to proceed into division.
What are cell cycle checkpoints?
This baseline evolutionary principle explains why a population of peppered moths that happens to match a darkened forest background will survive at higher rates over time.
What is natural selection (or survival of the fittest)?
In a DNA gel analysis, a known baseline or positive strain sample is run alongside unknowns to serve as this vital comparative standard.
What is a control sample?
This specialized evolutionary selection mechanism drives self-sacrificing altruistic behaviors because the actions protect close genetic relatives who carry identical alleles.
What is kin selection?