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Meiosis Preview Term

Review of some DNA terms and Meiosis

TermDefinition
Chromosome Tightly coiled, compact strands of DNA. Cannot read the instructions but can move the strand easily.
Gene A section of DNA that codes for a specific protein/trait
Chromatin Long loose strands of DNA that can be used/read to build proteins.
DNA Instructions for building proteins. A polymer made of monomer nucleotides. The sequence of nitrogen bases on the nucleotides make the code.
Sister Chromatids When the DNA has been copied and is still attached to the replicated copy by a centromere.
Homologous Chromosomes Two strands of DNA that have the same genes on them One comes from the mother and one comes from the father.
Tetrads When the homologous chromosomes are paired together and they are still attached to their replicated copy
Meiosis Process that produces gametes with half the number of chromosomes as the parent. Needed so offspring can have same amount of DNA as parent.
Diploid Two of each kind of chromosome (2N)
Haploid One of each kind of chromosome (N)
Gamete A haploid sex cell. (Egg for girls and sperm for boys.)
Fertilization The joining of two haploid sex cells
Zygote The diploid cell that results from the joining of gametes
Sexual Reproduction The type of reproduction that joins 2 haploid gametes to make a genetically new individual (offspring)
Created by: k2hutson