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Genetics
stuff
17
Biology
10th Grade
05/05/2009

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Term
genetics
Definition
the field of biology that focuses on how characteristics are transmitted from parents to offspring
Term
dominant
Definition
referring to a factor that masks another factor for the same trait
Term
recessive
Definition
a factor that IS masked by another
Term
law of segragation
Definition
the separation of two factors for the same trait when a gamete forms
Term
allele
Definition
an alternative form of a gene
Term
punnett square
Definition
a way to show the possible outsomes of a genetic cross
Term
phenotype
Definition
the expression of a genotype of an organism
Term
genotype
Definition
the genetic makeup of an organism
Term
homozygous
Definition
the condition where both alleles of a pair are alike
Term
heterozygous
Definition
the condition where both the alleles of a pair are different
Term
monohybrid cross
Definition
a cross between individuals that inviolves one trait
Term
dihybrid cross
Definition
a cross between indivduals that involves two traits
Term
incomplete dominance
Definition
A situation where two or more allels influence the phenotype, which is inbetween that of the parents
Term
codominance
Definition
a situation where both alles of a gene are exoressed in a heterozygous individual
Term
sex chromosome
Definition
a chromosome that carries the genes that determine an individuals sex
Term
x-linked trait
Definition
a trait whos alleles are located only on the x chromosome
Term
pedigree
Definition
a family history that shows individuals who display a particular trait and those who do not dis[lay the trait.
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