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Genetics
D.Sykes
13
Science
7th Grade
02/10/2010

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Term
allels
Definition
the different forms of a gene Y and y are different alleles of the gene that determines seed color
Term
dominant trait
Definition
atrait expressed preferentially over another trait
Term
F1 generation
Definition
Offspring of across between two breeding plants homozygous for the trait of interest
Term
F2 generation
Definition
offspring of a cross involving F1 generation
Term
genotype
Definition
the genetic constitution of an organism with respect to a trait.yellow seeds are dominant,but yellow seeded plants could have a genotype of either YY orYy
Term
heterozygous
Definition
Differing alleles 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 dominant or recessive
Term
hybrid
Definition
heterozygous usually reffering to the offspring of2 true breeding(homozygous)individuals differing in the traits of interest
Term
monohybrid cross
Definition
cross involving parents differing in only one trait
Term
mutation
Definition
Change in the DNA sequence of a gene to some but now always a recassive allele new,heritable form. generall
Term
Phenotype
Definition
the phisical apearance of an organism w/respect to a trait
Term
recessive trait
Definition
the opposite of a dominant a potentially masked trait
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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