Nondisjunction

Tuesday February 26^th

At the end of meiosis we have created 4 haploid gametes, in males these are known as Sperm in females these are known as Eggs

If a female gamete and a male gamete combined, how many chromosomes would the resulting cell have? 46 which would be haploid or diploid?

During meiosis 1 homologous chromosomes separate from each other.  If this did not happen with one of the pairs and then meiosis went on as normal what would the resulting gametes look like?

The result would be two of the gametes having an extra chromosome and the other two gametes missing a chromosome.  

After going through the daily questions and using your magnetic chromosomes, we moved into notes on this specific abnormality known as nondisjunction - For an online tutorial on this check out the following link http://learn.genetics.utah.edu/content/begin/traits/predictdisorder/