would karyotypes from the same family look the same?

Question

Explain please

Answer 1

Generally, karyotypes from the same species all look the same.
Karyotypes are just the stained chromosomes from the nucleus of a cell. Only large abnormalities are picked up, such as differences in chromosome number (Trisomy 21, Turner syndrome[XO], XXX syndrome etc), deletions, translocations and inversion in bands on the chromosomes. They are not meant to be as specific as DNA analysis, which uses a more precise method to separate gene structure.

Answer 2

While chromosomes in a karyotype do look the same to most people, there can be differences. These benign differences are due to heterochromatin. Heterochromatin is repetitive DNA near the centromeres of certain chromosomes like 1,9,16,and Y. The heterochromatin on 9 can vary so much that one chromosome 9 can be 1/2 taller than the other one. So, if you karyotyped everyone in a family that had variations in h+ the karyotypes could be visually different. The web site below has an example of 9qh+. The 9 on the left has 1/3 again as much heterochromatin as the one on the right. C banding lets cytogeneticists look at the heterochromatin on chromosomes to make sure it is just the repeated DNA and not a translocation.

Answer 3

Karyotypes are pictures of your chromosomes. Everyone's chromosomes will look the same, unless they have a genetic disorder like Fragile X syndrome, Down Syndrome, etc.