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Meiosis

TermDefinition
Meiosis Division one parent cell divides twice to form four gametes, each containing half the genetic information of the parent cell
Meiosis and Sexual Reproduction contribute to genetic variation within a population
Asexual Reproduction one individual passes genes to offspring without fusion of gamete’s - produced clones
Sexual Reproduction two individuals contribute genes to offspring, creating unique combinations of parental genes
Human Life Cycle diploid adults (2n) produce haploid gametes (1n) via meiosis. Fertilization forms a zygote (2n), which divides by mitosis into mature organism
Alternation of Generations found in plants and algae. - includes diploid sporophyte (produces spores by meiosis) and haploid gametophyte (produces gametes by mitosis)
Overview of Meiosis - begins after DNA replication - two divisions: Meiosis I (separates homologous chromosomes), Meiosis II (separates sister chromatids) - results in 4 haploid daughter cells
Meiosis I homologous chromosomes pair and separate
Meiosis II sister chromatids separate, forming 4 haploid cells
Independent Assortment random alignment of homologous pairs at metaphase
Crossing Over Exchange of DNA segments between no sister chromatids during prophase I - produces recombinant chromosomes
Random Fertilization any sperm can fuse with any egg
Created by: user-1996390
 

 



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