Examlex
When the Potosí mines in Peru opened in 1545
Gamete
A mature haploid male or female germ cell which is able to unite with another of the opposite sex in sexual reproduction to form a zygote.
Spermatogenesis
The process by which male spermatozoa are produced, involving meiosis and subsequent maturation.
Oogenesis
Production of eggs in females by the process of meiosis and maturation.
Sister Chromatids
Identical copies of a chromosome, connected by a centromere, created during DNA replication and present in a cell before it divides.
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