Dans le Webster, "Homogametic" (traduit par homogamétique par l'Office québécois de la langue française), qui semble bien être l'adjectif de "homogamety" est défini comme suit: "forming gametes which all have the same type of sex chromosome.
La définition de "homogamy" est encore plus simple : "the mating of like with like" et l'OLF ajoute "Inbreeding commonly due to spatial isolation".
Voici quelques exemples de mise en contexte de "homogametic" provenant de Wikipedia (
http://en.wikipedia.org)
Citation:
Where the a gene is sex-linked, the heterogametic sex (e.g. human males) have only one copy of the gene and are effectively haploid for that gene, whereas the homogametic sex (e.g. human females) and are diploid.
Et un plus complexe, même source :
Citation:
Sex linkage is the phenotypic expression of an allele that is dependent on the sex of the individual and is directly tied to the sex chromosomes.
In such cases there is a homogametic sex and a heterogametic sex. In mammals the homogametic sex is female (XX) and the heterogametic sex is male (XY), thus the sex linked genes are carried on the X chromosome. In birds and some insects the homogametic sex is male and has ZZ chromosomes, with females ZW, sex-linked genes are on the Z chromosome, and "male" and "female" are exchanged.
Dominant sex-linked genes are rare. Potentially expressed in both sexes, a sex preference may still exist.
X-linked recessive genes are expressed in all heterogametics, but only those homogametics that are homozygous for the recessive allele. An example is the sex-linked recessive: horns in sheep that appear only in males. The recessive phenotypes of such genes are more common in males than in females; to be precise, the incidence in females is the square of that in males, so if 1/20 of the male population is green-blind, 1/400 of the female population is. (AIS does not follow this rule because it interferes with reproduction.)
Sex-linked traits are inherited through chains of carrier mothers. That is, a girl, her mother, and her mother's mother all are carriers, while some of their sons have the trait.
J'avoue que c'est un peu trop compliqué pour moi
mais je sais qu'il y en a plusieurs ici qui sont vraiment calés alors c'est pour ça que je fournis tout ça, au cas où ça intéresserait/aiderait quelqu'un.
Pourrais-tu expliquer ce qu'est homogamety?
