What is nondisjunction?

Failure of homologous chromosomes or sister chromatids to separate appropriately during cell division.

Gain or loss of individual chromosomes, rather than whole chromosome sets; examples include monosomy and trisomy.

Loss of one chromosome from the usual diploid complement, giving 2n − 1.

An additional copy of one chromosome in a diploid complement, represented as 2n+1.

Having more than two complete chromosome sets, for example triploidy (3n) or tetraploidy (4n).

Flashcard deck

Genetics & Genomics — Flashcards

Genetics & Genomics50 cardsBeginnerEnglish

A flashcard deck with 50 cards in genetics & genomics, made by Prognia.

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50 flashcards:19classic-qa,13term-definition,6concept-explanation,7cloze and5compare-contrast. Introductory genetics and genomics practice: 50 flashcards and 50 quizzes cover Mendelian and non-Mendelian inheritance, chromosome structure and segregation, chromosome-number and structural abnormalities, simplified single-locus models, multiple-gene and environmental influences, population genetics, linkage and physical maps, and genome versus exome sequencing targets. Every item links source evidence, concepts and learning objectives. Twenty-five objectives support topic-specific recommendations. This is an initial practice set, not comprehensive clinical genetics training. Probabilities refer to explicitly simplified educational models, not individualized genetic counseling.