Question

which of the following statements about karyotypes is correct?
select the correct answer(s).
karyotypes are pictures of chromosomes arranged in pairs.
karyotypes can show what traits a person will inherit.
karyotypes can show small changes in individual genes.
karyotypes are used to identify altered, missing, or extra chromosomes.
karyotypes are used to measure the amount of dna in a cell.

Explanation:

A karyotype is an image of chromosomes arranged in pairs. It can show if there are extra, missing, or altered chromosomes (like in Down syndrome where there is an extra chromosome 21). It cannot show what traits a person will inherit (traits are determined by complex gene - environment interactions and not just chromosome number/arrangement in a simple way). It also cannot show small changes in individual genes (for that, techniques like DNA sequencing are needed) and it is not used to measure the amount of DNA in a cell (spectrophotometry or other DNA - quantification methods are used for that).

Answer:

A. Karyotypes are pictures of chromosomes arranged in pairs.
D. Karyotypes are used to identify altered, missing, or extra chromosomes.