Reproduction

• All that living things do is get energy & reproduce.

• The two types of reproduction are asexual & sexual reproduction.

It all starts by the splitting of DNA by fertilization.

Fertilization!!!

• Sexual Reproduction:
  

A sperm cell enters the egg. When it does the tail falls off and the head explodes letting out the Male DNA. 

Meiosis

Think of meiosis as making a MINI me.  In this process a single diploid cell, is divided into 4 different haploid cells. 

Meiosis insures variety because of two things. During prophase the tetrads cross-over. When they cross over, they exchange some genetic material. 

Then in meiosis II, they separate into 4 completely different cells. Not one containing the same information.

ASEXUAL REPRODUCTION!

During asexual reproduction, MITOSIS takes place.

During mitosis, a single cell divides into 2 cells in 6 stages.

Prophase, metaphase, anaphase, telophase, cytokinesis, and interphase.

Chromosomes line up in a straight line in the middle of the cell and then are pulled apart by spindles.

So whats the difference??

How is DNA Replicated?

The Female & Male DNA are unzipped by enzymes, then re-zipped almost immediately. 

DNA is made of 4 substances & is based on complementary base pairing meaning that the bases will always be paired with the same different base. A is always with T & C is always paired with G. That way when its easy for the cell to put the DNA together. They are held together by weak hydrogen bonds, which is where the enzymes break apart the DNA.

The Female & the male both have 23 chromosomes.  meaning the offspring will have 46 chromosomes. 

DNA

NOT DONE!!!