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ch 8
mendel and heredity
25
Biology
10th Grade
03/16/2008

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Term
Heredity
Definition
the passing of characters from the parents to  offspring
Term
Genetics
Definition
the branch of biology that focuses on heredity
Term
Monohybrid Cross
Definition
a cross that involves one pair of contrasting traits
Term
True-Breeding
Definition
a particular character
Term
P Generation
Definition
the first two individuals tha are crossed in a breeding experiment
Term

F1 Generation 

Definition
the offspring of the p eneration the first filial genteration
Term
F2 Generation
Definition
the offspring of the f1 generation plants the second filial generation
Term
Alleles
Definition
differnet versions of a gene
Term
Dominate
Definition
expressed form of character
Term
Recessive
Definition
the trait that was not expressed when the dominate form of the character was present
Term
Homozygous
Definition
two alleles of a particular gene present in an individual are the same
Term
Heterozygous
Definition
the alleles of a particular gene present in an indidvidual are different
Term
Genotype
Definition
the set of alleles that an indidvidual has for a character
Term
Phenotype
Definition
the physical appearance of a character
Term
Law of Segregation
Definition
the two alleles for a character separate when gemetes are formed
Term
Law of Independant Assortment
Definition
the alleles of different genes separate independantly of one another during gamete formation
Term
Punnett Square
Definition
a giagram that predicts the outcome of a genetic cross considering all possible commbinations of a gametes in the cross
Term
Test Cross
Definition
a individual whose phenotype is dominate but whose genotype is not known is crossed with a homozygous ressive individual
Term
Pedigree
Definition
a family history that shows how a trait is inherited over several generations
Term
sex-linked genes
Definition
allele is located only on the x or y chromosome
Term
Polygenic Inheritance
Definition
genes influenced a character
Term
Incomplete Dominace
Definition
an individual dominate allele is unable to express itself fully
Term
Muliple Alleles
Definition
genes with three or mor alleles
Term
Codominace
Definition
both forms of the character are displayed
Term
Genetic Disorders
Definition
genes that are damaged or copied incorectly
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