Assertion: ovum's number | /r/HasProperty | regained
Facets:
Source sentences:
text: When the female reproductive cell, or ovum, joins with the male reproductive cell, or sperm, the correct full number of chromosomes is regained.
text: The significance of meiosis for reproduction and inheritance, however, was described only in 1890 by German biologist August Weismann, who noted that two cell divisions were necessary to transform one diploid cell into four haploid cells if the number of chromosomes had to be maintained.