back cross
back cross A mating between individuals of the parental generation (P) and the first generation of offspring (F1) in order to identify hidden recessive alleles. If an organism displays a dominant characteristic, it may possess two dominant alleles (i.e. it is homozygous) or a dominant and a recessive allele for that characteristic (i.e. it is heterozygous). To find out which is the case, the organism is crossed with one displaying the recessive characteristic. If all the offspring show the dominant characteristic then the organism is homozygous, but if half show the recessive characteristic, then the organism is heterozygous. See also test cross.
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Incomplete Dominance , incomplete dominance In genetics, the situation of partial dominance in which a heterozygote shares a phenotype that is quantitatively intermediate b… Dominant , dominant •abeyant, mayn't •ambient, circumambient •gradient, irradiant, radiant •expedient, ingredient, mediant, obedient •valiant • salient • resili… Apical Dominance , apical dominance Recessive , re·ces·sive / riˈsesiv/ • adj. 1. Genetics relating to or denoting heritable characteristics controlled by genes that are expressed in offspring only… Cross , Cross
This article treats both the cross and the sign of the cross. It discusses: the history, forms, uses and blessing of the cross, the history and… Characteristic , char·ac·ter·is·tic / ˌkariktəˈristik/ • adj. typical of a particular person, place, or thing: large farms are characteristic of this area. • n. 1. a…
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back cross