Gene Map

Gene Map~ diagram showing the reletive locations of each known gene on a praticular chromosome.

Crossing Over

Crossing-Over~ Homologous chromosomes exchange portions of their chromatids during meiosis.

Tetrad

Tetrad~ Structure containing 4 chromatids that forms during meiosis.

Meiosis

Meiosis~ Process by which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell.

Diploid

Diploid~Term used to refer to a cell the contains both sets of homologous chromosomes.

Haploid~ Term used to refer to a cell that conatains one set of chromosomes.

Homologous

Homologous~ Term used to refer to chromosomes tgat each have a corresponding chromosome from the opposite-sex parent.

Genotype

Genotype~ genetic makeup of an organsim.

Phenotype

Phenotype~ Phsical charactersitics of an organism.

Heterozygous

Heterozygous~ Term used to refer to an organism that has two different alleles for a trait.

Homozygous

Homozygous~Term used to refer to an organsim that has two identical alleles for a praticular trait.

Punnett Square

Punnett Square~ Diagram showing the gene combinations that might result from a genetic cross.

Probabiltiy

Probability~Likely hood that a praticular event will occur.

Gamete

Gamete~ Specialized cell involved in sexual reproduction.

Segregation

Segregation~Separartion of alleles during gamete formation.

Allele

Allele~One of a number of different forms of a gene.

Gene

Gene~ Sequences of DNA that codes for a protein and thus deteremines a trait.

Hybrid

Hybrid~ Offspring of crosses between parents with different traits.

Trait

Trait~ Specific characteristic that varies from one individual to another.

True-Breeding

True-Breeding~ Term used to describe organisms that produce offspring identical to themselvesif allowed to pollinate.

Chapter Eleven Vocabulary

Genetics- Scientific study of heredity.