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Stegall-Bio(308) #9

Stegall-Heredity

QuestionAnswer
Chromosome? Supercoiled structure of DNA
Where are Chromosomes located? In the nucleus of every living cell.
Where are Genes located? On Chromosomes.
What is a Gene? A small section of a Chromosome containing a specific sequence of nucleotides, which carries information for specific heredity traits.
Allele? Different versions of a trait expression in a gene.
Genotype? Pair of Allels which express one trait.
Phenotype? Physical expression of the Genotype.
Punnett Square? Diagram used to predict the expected outcome of a genetic cross in offspring.
Pedigree? Family history tracing a specific genetic trait.
DNA? DeoxyiriboNucleic Acid -Doubls-stranded, helical nucleic acid.-stores hereditary info.
Female sex chromosomes? XX
Male sex chromosomes? XY
How many Chromosomes do Human Beings have? 23 pairs
Genetics? The study of Heredity.
Heredity? Passing of traits from parents to offspring.
Variation? Differences within a group sharing many things in common.
Mutation? Rare & random change in DNA which is usually harmful.
Not inherited unless on sex chromosome before the time of reproduction. Mutation
Meiosis Process by which Chromosome divide in half to produce the sex cells necessary for sexual reproduction.
Gamete Sexual reproduction cell
insures that offspring of sexual reproduction will receive half their DNA from one parent and half from the other. Meiosis
Created by: kastega
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