Question

Hey!! so I need help with a biology question if anybody can help??
A person with the genetic disorder Klinefelter's syndrome has an extra x-chromosome. Affected individuals have the genotype XXY. What can you infer is most likely the genetic mutation that results in Klinefelter's syndrome?

Non-disjunction during meiosis

Complete duplication of chromosomes during polyploidy

Translocation during genetic replication

Crossing over during meiosis

Answer 1

I'm glad to help!
What have you learned so far about each of the possible answers?

Answer 2

oo I have not idea about them...thats why I was hoping someone would explain them to me!! :)

Answer 3

*no

Answer 4

Ok, I have a lesson on this let me just get the pdf...

Answer 5

okay thanks :)

Answer 6

Okay, so let's first look at what is "crossing over during meiosis"
I highlighted the part that we will be looking at, but I included the full lesson in case you needed review/or didn't get to that part yet

Answer 7

wow! thank you :)

Answer 8

of course =)

Answer 9

okay so its not the first one...right?? because meiosis is the homologous chromosomes separate and migrate to opposite sides of the cell. and that is not non-disjunction

Answer 10

i'm checking my textbook don't want to give you a wrong answer :)

Answer 11

okay thanks :)

Answer 12

Actually, I think that it is nondisjunction, because he has an extra X due to a genetic disorder. Here's the part on nondisjunction:

Answer 13

okay thank you soooo much :)

Answer 14

You are welcome! I am so glad that I was able to help you =)

Answer 15

yes!!! you were a great help :) I will give you a medal :)

Answer 16

thank you! you are so kind

Answer 17

haha no you deserved it :) have a good rest of your day :)