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BIO101: Life Science 1
Bradley University BIO101 Section I (vocab quiz/exam 1)
31
Biology
Undergraduate 1
09/01/2010

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Term
genetics
Definition
the study of inherited variations
Term
cells
Definition
the fundamental unit of life
Term
RNA
Definition
a nucleic acid responsible for constructing proteins
Term
DNA
Definition
the nucleic acid that makes up our genetic material
Term
gene
Definition
a sequence of DNA that instructs a cell to manufacture a specific protein
Term
chromosome
Definition
a continuous molecule of DNA and proteins
Term
genome
Definition
an organism's complete set of genetic instructions
Term
genomics
Definition
the study of the function and interactions between genes, DNA sequences, of genomes
Term
allele
Definition
a variant of a gene
Term
mutation
Definition
a process by which an organism's DNA becomes altered
Term
gene pool
Definition
all genes in a given population
Term
dominant
Definition
the gene variant that is expressed when presented in a single copy
Term
recessive
Definition
an allele whose expression is masked by the presence of another allele
Term
genotype
Definition
the combination of alleles in a organism, giving it specific traits or disorders
Term
phenotype
Definition
the expression of a gene in traits of symptoms
Term
multi-factorial traits
Definition
traits determined by several genes and the environment
Term
pedigree
Definition
a chart that depicts relationships and transmissions of inherited traits
Term
genetic heterogeneity
Definition
2 or more different genes produce the same phenotype (i.e. alzheimer's disease and cystic fibrosis)
Term
pleiotropy
Definition
when a gene is responsible for the control of several functions or multiple effects
Term
recombinant
Definition
non-parental allele combination in offspring
Term
an example of a co-dominant relationship:
Definition
blood-typing (A, B, AB, O)
Term
epistasis
Definition
the interaction between two different genes that affects the expression of one over the other (i.e. albinism)
Term
an example of incomplete dominance
Definition
snapdragons
Term
incomplete dominance
Definition
when one trait is not expressed dominantly over the other completely (red mixing with white=pink)
Term
homozygous
Definition
a person/thing with two identical alleles
Term
heterozygous
Definition
a person/thing with two different alleles
Term
locus
Definition
location of a gene on a chromosome
Term
wild type
Definition
most commonly observed genotype or phenotype (for eye color= brown)
Term
a punnett square...
Definition
helps us mathematically determine the probability of inheriting a particular trait
Term
the law of segregation explains...
Definition
the distribution of alleles of a gene into separate gametes during meiosis
Term
after meiosis the cells are considered:
Definition
haploids
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