True breeding
an individual that produces offspring identical to the parent.
Polygenic inheritance
two or more different genes influencing one characteristic.
Mutant
the version of a character that occurs less frequently.
Wild-type
the version of a character that most commonly occurs in nature.
Testcross
breeding a subject with unknown genotype and dominant phenotype with a recessive individual to determine the genotype of the individual.
Hybrids
someone who is heterozygous for a trait.
Meiosis
the splitting of somatic cells into gametes.
Heredity
the study of genes along a timeline.
Monohybrid cross
crossing two hybrids for one trait.
Carrier
someone who is heterozygous for a recessive genetic disease, they dont have the disease but could pass it on to children.
Pleiotropy
a gene that controls more than one physical trait.
Linked genes
genes located near each other on a chromosome that tend to be inherited together.
Pedigree
a family tree used to map traits and genotypes.
character
a heritable feature that varies among members of a population.
X-linked genes
genes linked to the x chromosome.
Phenotype
the physical appearance of a person.
Punnett square
a device used to predict crosses.
Genotype
the actual genes someone has.
Environmental influence
Environment can change someone’s phenotype.
Alleles
genes that code for different traits.
Genetic map
a listing of the relative listings of genes along a chromosome.
Recombinant progeny
children with a different allele combination than their parents.
Genetics
the study of genes and inheritance.
Recessive allele
a version of an allele that will only show if two are present.
sex-linked gene
a gene on the x or y chromosome
Dihybrid cross
crossing two individuals heterozygous for two traits.
Recombination frequency
the probability that genes will recombine.
Dominant allele
an allele that will show if there is only one present
F1 generation
the first generation of children after a cross
F2 generation
the generation of children after crossing the F1 generation
Heredity
the study of genes along a timeline
Locus
a location or position
P generation
the subjects that are being crossed in a cross
Trait
a characteristic
Cell specialization
When certain cells are designed for specific functions
vacuole
A large vesicle with a variety of functions within the cell.
Organ
Multiple tissues working together to perform a specific task
Organ system
Multiple organs working together to perform vital life functions
isotonic
A solution outside of a cell which has the same concentration of solute as the solution inside of the cell
Hydrophilic
Being attracted to water
Active transport
A way of letting large molecules across the cell membrane with the use of energy
endocytosis
A form of active transport that takes large matierials into the cell.
Semipermeable
Allowing some things to pass but not others
multicellular
consisting of multiple cells
vesicles
a sac made of membrane in the cytoplasm of a eukaryotic cell
organ systems
multiple organs functioning together to serve a specific purpose
organism
An individual living thing
diffusion
the random movement of particles resulting in the net movement of a substance down its concentration gradient
lipid bilayer
a double layer of lipids
passive transport
The transport of a substance across the cell membrane through diffusion without using energy
Exocytosis
When a substance leaves a cell by a vesicle fusing with the cell membrane
Positive feedback loop
A form of regulation where a change to homeostasis is amplified
organelle
A specialized part of a cell
homeostasis
The steady state of bodily functioning
Unicellular
Consisting of one cell
hypotonic
A solution that, when surrounding a cell, has a lower concentration than the concentration of solution inside the cell
Osmosis
The movement of water through a selectively permeable membrane
concentration
The amount of solute in a solution
transport protein
a protein that aids in transporting things across the cell membrane
permeable
allowing things to pass or diffuse through
Negative feedback loop
a form of homeostasis where a change to homeostasis is worked against
Prokaryote
a type of cell without a nucleus or any membrane bound organelles
tissue
a group of cells working together to serve the same function
central vacuole
A large vacuole that stores water in plant cells
hypertonic
when the concentration of a solute is higher outside of a cell than inside of a cell
hydrophobic
does not dissolve in water/repels water
facilitated diffusion
diffusion with the help of a protein; used for polar or larger molecules
turgor pressure
a pressure exhibited by a plant cell's cell wall making sure the cell does not gain too much water and burst
impermeable
not allowing anything to pass
tonicity
the ability of a solution surrounding a cell to cause the cell to gain or lose water
Homeostasis
the steady state of bodily functioning.
Theory
a widely accepted idea broader than a hypothesis.
Ecosystem
all the organisms in a given area.
Organism
an individual living thing.
Hypothesis
a testable explanation for a set of observations based on the available data.
Biosphere
the entire portion of Earth inhabited by life.
Emergent properties
new properties that arise as you go up the hierarchy of life.
Population
a group of individuals belonging to a species that live in the same geographic area and can be potentially interbred.
Independent variable
a factor with a variable changed to reveal effects.
Dependent variable
a factor that is measured.
Matter
anything that occupies space and has mass
Element
a substance that cannot be broken down to other substances by chemical means
Compound
a substance containing two or more elements in a fixed ratio
Trace Elements
an element required for life in small amounts
Proton
a subatomic particle with a positive charge
Electron
a subatomic particle with a negative charge
Neutron
a subatomic particle with no charge
Nucleus
an atom’s central core which contains protons and neutrons
Atomic Number
the number of protons in an atom of a particular element
Mass Number
the amount of protons and neutrons in a cell’s nucleus
Atomic mass
the total mass of an atom
Isotopes
an atomic form of an element with the same number of protons but different amounts of neutrons
Ionic bond
a bond between opppositely charged ions
Covalent bond
a chemical bond where two atoms share valence electrons
Molecule
two or more atoms held together by covalent bonds
Electronegativity
the attraction of an atom for electrons of a covalent bond
Ion
an atom with an electrical charge
Salt
a compound resulting from the forming of an ionic bond
Hydrogen bond
a weak chemical bond formed when the slightly positive hydrogen atom of a polar covalent bond in one atom is attracted to the slightly negative atom of a polar covalent bond in another molecule
Polar molecule
a molecule containing polar covalent bonds and having an unequal distribution of charges in different regions of the molecule