#50 How does sexual reproduction occur? Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min #50 How does sexual reproduction occur? #50 Warm UP A human body cell has 23 pairs of chromosomes, 46 total. How many chromosomes should be in a human sperm cell and how many in a human egg cell? Why?
#50 How does sexual reproduction occur? Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min #50 How does sexual reproduction occur? How does sexual reproduction occur? Two sources of DNA Gametes are special sex cells that contain half of a set of DNA Sperm: made by the male Egg: made by the female Fertilization is when the sperm and the egg join together
#50 How does sexual reproduction occur? Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min #50 How does sexual reproduction occur? Fertilization in Animals Internal Fertilization – sperm joins egg inside the female’s body –land animals, mammals, humans External Fertilization – female lays eggs and male releases sperm onto the eggs, fertilization occurs outside of the body –fish, amphibians (water environments)
#50 How does sexual reproduction occur? Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min #50 How does sexual reproduction occur? What happens during fertilization? Each gamete carries one copy of each chromosome (1n) When gametes unite, homologous, or matching, chromosomes pair up (2n) Gametes always have half as much DNA as body cells so they are called haploid
#50 How does sexual reproduction occur? Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min #50 How does sexual reproduction occur? Don’t Forget About Meiosis!
#50 How does sexual reproduction occur? Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min #50 How does sexual reproduction occur? How does one cell become a multicelluar organism? After fertilization, the zygote does mitotic cell division (mitosis) to become an embryo After many more divisions, the cells start to get “job assignments” depending on their location
#50 How does sexual reproduction occur? Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min #50 How does sexual reproduction occur? Cell Specialization/Differentiation All of the embryo’s cells have the same set of DNA Each cell gets a signal that tells it where it is and what parts of the DNA to use Cell Communication - hormone signals zygote The specialized cells make up tissues, then organs
#50 How does sexual reproduction occur? Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min #50 How does sexual reproduction occur? Animal Embryo Videos Make observations as you watch the videos of human embryonic development and frog embryonic development
#50 How does sexual reproduction occur? Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min #50 How does sexual reproduction occur? Human Fertilization & Development
#50 How does sexual reproduction occur? Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min #50 How does sexual reproduction occur? Regents Practice
#50 How does sexual reproduction occur? Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min #50 How does sexual reproduction occur? Activity – Flowchart 1.Create a flowchart that shows the growth and development of a multicellular organism 2.Include the processes of meiosis, fertilization, mitosis, and differentiation, growth 3.Add illustrations and descriptions Extension: 1.Work on the Regents Practice HOMEWORK. 2.Work on VOCAB Extension: 1.Work on the Regents Practice HOMEWORK. 2.Work on VOCAB
#50 How does sexual reproduction occur? Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min #50 How does sexual reproduction occur? Summary Let’s review each table’s flowchart.
#50 How does sexual reproduction occur? Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min Agenda: Warm UP: 5 min Minilesson: Fertilization & Development 20 min Activity: Flowchart 15 min Reflection: 5 min #50 How does sexual reproduction occur? Why is it important for cells to communicate with each other during the process of differentiation? QUIZ TOMORROW! HOMEWORK Regents Practice – Sexual Reproduction VOCAB Why is it important for cells to communicate with each other during the process of differentiation? QUIZ TOMORROW! HOMEWORK Regents Practice – Sexual Reproduction VOCAB REGENTS PRACTICE Reflection