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13 Cards in this Set

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  • Back
meiosis
the creation of gemetes (sex cells)
Gonad
sex organ
gene
a part of a chromosome that codes for a trait, location of chromosome
allele
a specific version of a gene, information that is that location
sister chromatids
exact copies of a chromosome that are linked by a centromere (same genes, same allele)
homologous chromosomes
a pair of chromosomes that code for the same traits but are not indentical (same genes, different alleles)
tetrads
homologous chromosomes pair up to form these
haploid
4 cells
each with half the number of chromosomes as the original
diploid
1 cell
full number of chromosomes
nondisjunction
when tetrads do not split whre they should in meiosis 1
OR
sister chromatids do not split when they should in meiosis 2
crossing over
parts of two non-sister chromatids can break off and switch with each other
spermatogenesis
a sperm gets through meoisis as described before with 4 sperm cells resulting
oogenesis
formation of eggs, only one egg is formed
the others would be eggs formed into "polar bodies" and do not mature