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Genetics

Genetics - most important terms

TermDefinition
gene a section of DNA that codes for a specific trait
meiosis the cell division which takes place to form sex cells called gametes (sperm and egg cells)
fertilization combination of two gametes (egg and sperm); results in a 2n zygote
gamete haploid sex cell (egg or sperm)
asexual reproduction reproduction using only mitosis; offspring are identical to parent
sexual reproduction reproduction involving meiosis and fertilization; leads to greater genetic variation in offspring
alleles forms of a gene
dominant trait that is expressed over recessive
recessive trait that is hidden when dominant is also present
genotype type of genes; what alleles the organism has for a trait
phenotype physical form; what trait shows in an organism
pedigree family tree diagram showing inheritance of a trait
karyotype visual representation of all the chromosome pairs from an individual organized by size
Created by: jdriscoll