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chapter11

termdefinition
Meiosis The process in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell.
Crossing-over The process in which homologous chromosomes exchange portions of their chromatids during meiosis.
Zygote A fertilized egg.
Homologous The term used to refer to chromosomes in which one set comes from the male parent and one set comes from the female parent.
Diploid The term used to refer to a cell that contains two sets of homologous chromosomes.
Haploid The term used to refer to a cell that contains only a single set of genes.
Codominance A situation in which the phenotypes produced by both alleles are completely expressed.
Incomplete dominance A situation in which one allele is not completely dominant over another allele.
Multiple alleles A gene that has more than two alleles.
Polygenic traits A trait controlled by two or more genes.
Independent assortment One of Mendel's principles that states that genes for different traits can segregate independently during the formation of gametes.
Probability The likelihood that a particular event will occur.
Homozygous Having two identical alleles for a particular gene.
Heterozygous Having two different alleles for a particular gene.
Phenotype The physical characteristics of an organism.
Genotype The genetic makeup of an organism.
Segregation The separation of alleles.
Gametes Sex cells.
Genetics The scientific study of heredity.
Fertilization The process in sexual reproduction in which male and female reproductive cells join to form a new cell.
Trait A specific characteristic of an individual.
Gene A factor that is passed from parent to offspring.
Allele One of a number of different forms of a gene.
Principle of dominance States that some alleles are dominant and others are recessive.
Created by: jboniface