Reproduction Notes

1. Reproduction Notes

2. LT.R.1-I can define sexual and asexual reproduction. • Know the definitions of sexual and asexual reproduction. • Sexual reproduction always has to include the combining of gametes from two parents. • The offspring produced by asexual reproduction is almost always an exact genetic copy of the single adult parent. • There are three main ways that asexual reproduction occurs: budding, spores, and mitosis.

3. In budding, a group of cells (called a bud) develops on part of the organism and eventually grows into a new individual. • Budding occurs in simple animals, like coral. • Fungi and mosses can make spores, which get carried away and grow into new organisms. • Single celled organisms reproduce by a form of mitosis.

4. LT.R.2-I can explain the importance of mitosis and meiosis in reproduction. • Mitosis occurs in single celled organisms as a form of asexual reproduction, but it also occurs in multicellular organisms. • In multicellular organisms mitosis is used to grow and develop new cells, like muscle cells. • Draw the diagram of mitosis.

6. Meiosis is important to sexual reproduction because it is what allows sexual reproduction to take place. • Without meiosis sexual reproduction would not produce offspring that were the same species or offspring that would even function. • Meiosis is the process that produces gametes.

7. Meiosis is a two step process that produces sperm cells in males and egg cells in females. • These gametes have only ½ the chromosomes of the organism they come from. They have 1 copy of each chromosome instead of 2. This is what allows organisms to produces offspring with the same number of chromosomes as the parents in sexual reproduction. • This is why you get ½ your chromosomes from your dad and ½ from your mom. • Draw the diagram of meiosis.

9. LT.R.4-I can compare the advantages and disadvantages of sexual and asexual reproduction.