Examlex
If a hydrocarbon is not aliphatic, it is ______________.
Zygotes
The initial cell formed when two gamete cells (e.g., sperm and egg) are fused, representing the earliest stage of embryonic development in sexually reproducing organisms.
Homologous Chromosomes
Pairs of chromosomes in a diploid organism that are similar in shape, size, and genetic content, one inherited from each parent.
Prophase I
The first stage of meiosis I where homologous chromosomes pair up and exchange genetic material through recombination.
Chiasma
An X-shaped site in a tetrad usually marking the location where homologous (nonsister) chromatids previously crossed over.
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