Compare and contrast the following three terms: polyploidy, aneuploidy, and nondisjunction. Identify
and briefly discuss examples of each of these conditions. Indicate whether the statement is true or false.
Concepts to Consider: Polyploidy is the condition in which an individual has multiple chromosome
sets and is rare in animals, although common in plants (and linked with speciation events). Aneuploidy
is a genetic abnormality involving the presence or absence of one chromosome. This is likely the result
of nondisjunction and includes Trisomy 21 (Down syndrome) and Turner syndrome (a monosomy).
Nondisjunction is the condition in which homologous chromosomes fail to separate during anaphase I
of meiosis and is linked to the conditions mentioned in the previous sentence.
You might also like to view...
Which of the following are unique characteristics or components of the adaptive—but not innate—immune system? Select all correct choices
A. immune memory B. opsonization C. natural killer cells D. phagocytosis E. specificity
Four of the five items listed below are
organelles found in eukaryotic cells. Select the exception. a. mitochondrion b. Golgi body c. nucleoid d. lysosome e. vacuole
Which of the following pairs shares a similar function?
A) adhesive junction–tight junction B) desmotubule–gap junction C) tight junction–gap junction D) plaque–plasmodesma E) connexon–desmosome
The mass extinction at the end of the Cretaceous period was likely the result of:
a. rising seawater. b. loss of vegetation. c. extreme predation. d. a dramatic change in climate. e. the appearance of new competitors.