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genetics part 2
chapter 11 genetics
16
Biology
10th Grade
01/14/2011

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Term
Incomplete Dominance
Definition
situation in which one allele is not completly dominant over another
Term
Codominance
Definition
situation in which both allels of a gene contribut to the phenotype of the organism
Term
Polygenic Traits
Definition
trai controlled by two or more genes
Term
Homologuos
Definition
term used to refer to chromosomes that each have a corresponding chromosome from the opposite-sex parent
Term
Diploid
Definition
term used to refer to a cell that contain both sets of homogouc chromosomes
Term
Haploid
Definition
term used to refer to a cell that cotains only a single set of chromosomes and therefore only a single set of genes
Term
Meisosis
Definition
process by which the number of chromosomes per cell is cut in half through the separation of the homologous chromosomes in a diploid cell
Term
Tetrad
Definition
struture cotaining 4 chromosomes that forms during meiosis
Term
Crossing over
Definition
process in which homologous chromosomes exchange portions of their chromatids during meiosis
Term
Gene map
Definition
diagram showing the ralitive locations of each known gene on a particular chromosome
Term
Probability
Definition
likelihood that a particular event will occur
Term
 Punnett Square
Definition
 diagram showing the gene combinations that might resultfrom a genetic cross
Term
Homozygous
Definition
term to refer to an organism that has two identical alleles for the same trait
Term
Heterozygous
Definition
term used to refer to an organism that has two different alleles for the same trait
Term
Phenotype
Definition
physical characteristic of an organism
Term
Genotype
Definition
genitic make up of an organism
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