heterogametic
41homogametic — adj. [Gr. homos, same; gamete, wife] Pertaining to sexual form that gives rise to the same type of sexual gamete in meiosis; in xx xy and xx xo systems usually found in the female; see heterogametic …
42Z-chromosome — A sex chromosome present in both sexes in female heterogametic reproduction …
43sex chromosome — Chromosome that determines the sex of an animal. In humans, where the two sex chromosomes (X and Y) are dissimilar, the female has two X chromosomes, and the male is heterogametic (XY). In birds, the opposite is the case, the male being XX and… …
44sex-linked disorder — A genetic defect, usually due to a gene on the unpaired portion of the X chromosome. Recessive X linked alleles are fully expressed in the heterogametic sex because they can have only one copy of the gene. Thus X linked mutant disorders are more… …
45Y chromosome — Chromosome found only in the heterogametic sex. Thus in mammals the male has one Y chromosome and one X chromosome. One region of the Y chromosome, the pseudoautosomal region, is homologous to and pairs with the X chromosome. The primary… …
46homogametic — /hoh moh geuh met ik, hom oh /, adj. Genetics. producing only one type of gamete with respect to sex chromosomes. Cf. heterogametic. [1905 10; HOMO + GAMETIC] * * * …
47genetics, human — ▪ biology Introduction study of the inheritance of characteristics by children from parents. Inheritance in humans does not differ in any fundamental way from that in other organisms. The study of human heredity occupies a central… …
48heterogamety — noun The production of gametes of different ploidy by an individual of one sex of an organism See Also: heterogamete, heterogametic …
49homogametic — adjective That produces, or contains only one type of sex chromosome Ant: heterogametic …
50Embryo — The organism in the early stages of growth and differentiation from fertilization to, in humans, the beginning of the third month of pregnancy. After that point in time, it is termed a fetus. * * * 1. An organism in the early stages of… …
