Pre AP Biology Chapter 11 Prentice Hall

Chapter 11 - Intoduct

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Cards In This Set

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Crossing-over
Crossng over occurs during meiosis, homologous chromosomes form a tetrad, chromatids cross over one another, the crossed sections of the chromatids are exchanged.
Codominance
Both alleles contibute to the phenotype
Probability
The likelyhood that a particular enent will occur.
Alleles
Different forms of genes. (tall & short plant for example)
Meiosis
Process of reduction division in which the number of chromosomes per cell is cut in half through the separation of homologus chromosomes
Haploid
A cell that contains one set of chromosomes
Tetrad
Structure formed by corresponding homologous chromosomes. There are 4 chromatids in a tetrad.
Genotype
Genetic makeup
Multiple Alleles
Genes having more than alleles
Genes
The chemical factors that determine traits.
Polygenic Traits
Having many genes
Segregation
Separation (of alleles)
Phenotype
Physical look of a gene
Punnett Square
Diagrams used to predict and compare genetic variations resulting from a cross.
Homologus Chromosomes
Four chromosomes from one parent having a cooresponding chromosome from the other parent.