Egg vs sperm production

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.  We will be talking
about what kind of problems this can cause tomorrow.

After going through the daily questions and using your magnetic chromosomes, we moved into the difference between egg and sperm production.  Here were the notes we took today

 

Some ways that i showed you this

When eggs form, three small polar bodies are created which will
die off and only One will become an egg.  It needs to be much larger
because it will carry all the cytoplasm an organelles for the zygote

Sperm on the other hand split evenly during meiosis I and II
creating 4 fairly small cells which will then develop
tails in order to "swim" towards the egg.

During fertilization, a sperm will break through the cell
membrane of an egg resulting in a diploid gamete.