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26 Cards in this Set

  • Front
  • Back
Genes
chemical factors that determine traits
Allele
one of a number of diffent forms of a gene
Segregation
Seperation of alleles
multiple alleles
three or more alleles of the same gene
Gametes
specialized cell involved in sexual reproduction
Probability
Likelihood of an event
Punnett square
Diagram showing the gene combinations that might result from genetic cross.
Genetics
The scientific study of heredity
Homozygous
Organisms with two identical alleles for particular trait.
Heteorzygous
Organism with two different alleles for the same trait
Phenotype
physical characteristics of organism as result of genetics
Genotype
Genetic characteristics of organism
True-breeding
used to describe organisms that produce offspring identical to themselves if allowed to self pollinate
Trait
A specific characteristic that varies from one individual to another
incomplete dominance
cases in which one allele is not completely dominant over another
polygenetic traits
trait controlled by two or more genes
haploid
cell with a single set of chromosomes and therefore a single set of genes
tetrad
structure containing 4 chromatids that forms during meiosis during prophase.
gene map
diagram showing the relative locations of each known gene on a particular chromosome.
Hybrids
Offspring of crosses between parents with different traits
idependent assortment
idependent segregation of genes during the formation of gametes
codominance
both alleles contribute to the phenotype of the organism
homologous
4 chromosomes that came from male parent has a corresponding chromosome from female parent
diploid
a cell that contains both sets of homoglous chromosomes
meiosis
process where number of chromosomes per cell is cut in half through seperation of homologous chromosomes in a diploid cell
crossing-over
process in which homologous chromosomes exchange portions of their chromatids during meiosis.