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genetics
H adley
13
Science
7th Grade
02/10/2010

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Term
alleles
Definition
the different forms of gene.Y and y are different alleles of the gene that determines seed colors
Term
dominant trait
Definition
a trait expressed preferentially over another trait
Term
f1 generation
Definition
offspring of A cross between true breeding plants, homozygous for the trait of intrest
Term
f2 generation
Definition
offspring of a cross involving f1 generation
Term
genotype
Definition
the genetic constituion of anorganism with respect to a trait yellow seeds are dominant but yellow seeded plants have a genotype of either YY or yy
Term
herozygous
Definition
both allels for a trait in an individual such as Yy
Term
homozygous
Definition
both allels for a trait are the same in an individual they can be homozygous dominant YY or homozygous ressesive yy
Term
hybrid
Definition
heterozygous usually reffering to offspring of twotrue breeding individuals differing in the traits of intrest
Term
monohybrid cross
Definition
cross involving parents differ in only 1 trait
Term
mutation
Definition
change in DNA sequence of a gene to some new ,heritible form generally but now always a ressesive allel
Term
phenotype
Definition
the physical appearence of an organism with respect to a trait
Term
ressisive trait
Definition
the oppisite of dominant a trait that is prefferbaly masked
Term
sex-linked
Definition
a gene coded on a sex chromosome such as the x-chromosome linked genes of flies and man
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