Question

question 8
trisomy occurs when an individuals cells:
have 3 of a particular type of chromosome
have three haploid sets of chromosomes
have the correct number of chromosomes
are missing 1 of a particular type of chromosome
none of these

Explanation:

Trisomy is a chromosomal disorder. In trisomy, an individual's cells have three copies of a particular chromosome instead of the normal two. For example, Down syndrome (trisomy 21) occurs when there are three copies of chromosome 21. Having three haploid sets of chromosomes is polyploidy (specifically triploidy if \(n = 1\) set, so \(3n\) is triploidy). Having the correct number of chromosomes is euploidy (in humans, \(2n=46\) is euploid). Missing one of a particular type of chromosome is monosomy.

Answer:

have 3 of a particular type of chromosome