Examlex
Why doesn't inbreeding depression, by itself, cause evolution?
XY
A set of sex chromosomes characteristic of male individuals in many species, including humans, where XY indicates a male genotype.
Meiosis
A type of cell division resulting in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores.
Germ Cells
Reproductive cells in sexually reproducing organisms that give rise to sperm and eggs.
Zygote
The initial cell formed when a sperm cell from a male and an ovum from a female merge during fertilization.
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