Examlex
What term is used for a legally recognized and socially approved relationship between two individuals that carries certain rights and responsibilities and usually involves sexual activity?
Zona Pellucida
A thick, transparent coating surrounding an oocyte (egg cell) and early embryo in mammals, playing a key role in fertilization by allowing sperm binding and inducing the acrosome reaction.
Vitelline Envelope
An acellular covering of the eggs of certain animals (e.g., echinoderms), located just outside the plasma membrane.
Granulosa Cells
The somatic cells in the ovary that surround developing female gametes (oocytes) and are involved in hormone secretion and oocyte maturation.
Haploid Chromosome
A set of chromosomes that is half the full set of genetic material, typical of gametes, where each cell contains one complete set of chromosomes.
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