NCEA Genetics - Chromosome mutations part 2

In this podcast we look at chromosome mutations that result in cells have unusual numbers of chromosome. The basics of aneuploidy and polyploidy are discussed.

Category:

Education

Tags:

• anueploidy
• polyploidy
• non-disjunction
• trisomy 21

[thekingclay]

Hi pinkpendant. That's an interesting idea.... By meiosis 1 I assume you are talking about the point when homologous pairs of chromosomes are lining up at the equator. When these pairs are separated they aren't attached so I don't think non-disjunction can happen here. If you think about it- This is the point where the maternal and paternal chromosomes are lining up and are then placed into different nuclei. As they're not attched, they can't be separated.. no opps for non-disjunction to occur.

[pinkpendant]

You didn't consider the fact that non-disjunction can also occur in Meiosis 1? It has the same consequences, right?