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kkaur
Genetics
13
Science
7th Grade
02/10/2010

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Term
alleles
Definition
The different forms of a gene . Y and y are different alleles of the gene that determines seed color.
Term
dominant trait
Definition
A trait expressed prefrentially over another trait
Term
F1 generation
Definition
offspring of a criss between true breeding plants, homozygous for the trait of interest
Term
F2 generation
Definition
offspring of a cross between true breeding plants, homozygous for the trait of interest
Term
genotype
Definition
the genetic consitution of an organism with respect to a trait yellow seeds are dominant but yellow seeded plants colud have a genotype of either YY or Yy
Term
heterozygous
Definition
differing alleles for a trait in an individual such as Yy
Term
homozygous
Definition
both alleles for a trait are the same in an individual
they can be homzygous dominant- YY or homzygous reccessive- yy
Term
hybrid
Definition
heterozygous usually referring to the offspring of two true breeding individuals differing in the traits of interest
Term
monohybrid cross
Definition
cross involving parents differing in only one one trait
Term
mutation
Definition
change in the dna sequence of a gene to some new heritable form
generally but now always a reccesive allele
Term
phenotype
Definition
the physical appearance of an organism with respect to a trait
Term
recessive trait
Definition
the opposite of dominant
a trait that is preferrrentially 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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