Shared Flashcard Set

Details

PoultrY Science Test 1 Vocab
Vocab
27
Biology
Undergraduate 3
02/02/2012

Additional Biology Flashcards

 


 

Cards

Term
Genetic Drift
Definition
is the change in the frequency of a gene variant (allele) in a population due to random sampling.[1
Term
Adaptive Radiation
Definition
occurs when a variety of new forms—including new related species—adapts to and fills a variety of ecological niches. 
Term
Mutation
Definition
occurs when a DNA gene is damaged or changed in such a way as to alter the genetic message carried by that gene.
Term
Maladaptation
Definition
Making the wrong adaptation
Term
Fitness
Definition
Ability to pass on genes, reproductive success.
Term
Stabilizing Selection
Definition
is a type of natural selection in which genetic diversity decreases as the population stabilizes on a particular trait value.
Term
Directional Selection
Definition
A type of selection that removes individuals from one end of a phenotypic distribution and thus causes a shift in the distribution. Selection that changes the frequency of an allele in a constant direction, either toward or away from fixation for that allele.  
     
Term
Disruptive Selection
Definition
A type of selection that removes individuals from the centre of a phenotypic distribution and thus causes the distribution to become bimodal
Term
adaptation
Definition
In the evolutionary sense, some heritable feature of an individual's phenotype that improves its chances of survival and reproduction in the existingenvironment.
Term
Speciation
Definition
A process whereby over time one species evolves into a different species (anagenesis) or whereby one species diverges to become two or more species(cladogenesis).
Term
Sexual Dimorphism
Definition
sexual dimorphism is the difference in morphology between male and female members of the same species.
Term
secondary sexual characteristics
Definition
Any of various genetically transmitted physical or behavioral characteristics that appear in humans at puberty and in sexually mature animals and that differentiate between the sexes without having a direct reproductive function
Term
Armament
Definition
Weapon for battle
Term
Ornament
Definition

Anything not used in battle. 

"Badge of Status" or for female choice

 

Ex. Combs & waddles, songs, dance, etc.

Term
Sperm Competition
Definition
a term used to refer to the competitive process between spermatozoa of two different males to fertilize an egg of a lone female.[1] Competition occurs whenever females engage in promiscuous mating to increase their chances in producing more viable offspring
Term
Extrapair Copulations
Definition
Copulation outside of the pair bond.
Term
Assortative Mating
Definition
The mating of individuals with similar phenotypes.
Term
Promiscuity
Definition
Having casual sexual relations frequently with different partners; indiscriminate in the choice of sexual partners  (can be male or female).
Term
Social Monogamy
Definition
Stay together > or = 1 breeding season and raise young together.
Term
Genetic Monogamy
Definition
All young have only genes of that pair
Term
Serial Monogamy
Definition
new mate EACH breeding season
Term
DNA fingerprinting
Definition
is a technique employed by forensic scientists to assist in the identification of individuals by their respective DNA profiles
Term
Monogamy
Definition
a form of marriage in which an individual has only one spouse at any one time
Term
polygyny
Definition
 a form of marriage in which a man has two or more wives at the same time
Term
polyandry
Definition
a form of marriage in which a woman has two or more husbands at the same time.
Term
locus
Definition
The position of a geneDNA marker or genetic marker on a chromosome
Term
alleles
Definition
Any one of the alternative forms of a given gene (e.g. the ABO gene has three major alleles: A, B and O alleles). One of two slightly different versions of agene that code for different forms of the same trait.
Supporting users have an ad free experience!