Suppose pcr is used to amplify a single dna marker on human chromosome 21. this is a way to identify individual chromosomes, such as paternal and maternal chromosome 21 from each parent. further suppose that a couple who have a child with down syndrome (trisomy 21) is examined for this marker. the mother has marker alleles of 310 and 380 bp. her mate has marker alleles of 290 and 340 bp. (hint: these are alleles of the same gene. they are simply being designated by size – in bp – instead of a letter. you can think of them as a1, a2, a3 and a4 if you prefer, with the child inheriting one allele from each parent). what combinations of pcr bands would be expected in their child with down syndrome if nondisjunction occurred in

mountains can affect the climate of nearby lands. in some areas, mountains block rain, so that one side of a mountain range may be rainy and the other side may be a desert. much of airborne moisture falls as rain on the windward side of mountains.

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mientras se trata la anorexia o la bulimia, es importante buscar ayuda antes que nada. un profesional de la salud mental será el más útil para aquellos que sufren anorexia o bulimia. este es un buen lugar para comenzar, sin embargo, ver a otros profesionales como dietistas registrados, especialistas médicos y dentistas podría ayudar a alguien a recuperarse de un trastorno alimentario. después de la ayuda profesional, o si la ayuda profesional no es una opción, alguien que se recupere de la anorexia o la bulimia debe rodearse de compañeros de apoyo, padres u otros miembros de la familia que también estén comprometidos con el proceso de recuperación.

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(i popped my answer into google translate so it may be a bit wonky)

what are the options

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