zygosityn.
/zʌɪˈɡɒsɪti/ Genetics.
a. The genetic relationship of twins, triplets, etc., in respect of their being either monozygotic or dizygotic.
ΘΚΠ
the world > life > biology > biological processes > procreation or reproduction > reproductive substances or cells > [noun] > zygote or syngamete > monozygosity, etc.
homozygosity1916
monozygosity1928
zygosity1952
1952 New Biol. 12 42 Instead of exchanging skin between the twin animals whose zygosity it is desired to establish, grafts are being transplanted from both of them to a third, unrelated recipient.
1971 Nature 23 July 277/1 Before recent developments with marker genes, it was not possible to assign with certainty the zygosity of a substantial proportion of twin pairs.
1978 Jrnl. Royal Soc. Med. 71 311/2 The type of twinning and determination of zygosity are given attention.
b. The degree of genetic similarity between alleles which determines whether an individual is homozygotic or heterozygotic for the characteristic expressed.
ΘΚΠ
the world > life > biology > biological processes > genetic activity > genetic components > [noun] > allele > condition with respect to
heterozygosity1912
zygosity1967
1967 Jrnl. Clin. Investig. 46 681 (heading) Relationship between Rh0(D) zygosity and red cell Rh0(D) antigen content in family members.
1967 Jrnl. Clin. Investig. 46 681 The members of two families showed a poor correspondence between antibody binding and zygosity.
1972 Transplantation XIV. 793/1 Efforts have been made to determine HL-A zygosity of unrelated subjects by use of the gene-dose effect.
This entry has not yet been fully updated (first published 1986; most recently modified version published online March 2018).
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n.1952