#50 How does sexual

reproduction occur?

#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 How does sexual

reproduction occur? #50 Warm UP#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?

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?

#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 How does sexual

reproduction occur?

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?

#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 How does sexual

reproduction occur? Fertilization in AnimalsFertilization 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?

#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 How does sexual

reproduction occur?

What happens during fertilization?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?

#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 How does sexual

reproduction occur?

Don’t Forget About Meiosis!Don’t Forget About Meiosis!

#50 How does sexual

reproduction occur?

#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 How does sexual

reproduction occur?

How does one cell become a multicelluar organism?

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?

#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 How does sexual

reproduction occur? Cell Specialization/DifferentiationCell 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?

#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 How does sexual

reproduction occur? Animal Embryo VideosAnimal Embryo Videos

Make observations as you watch the videos of human embryonic development and frog embryonic development

#50 How does sexual

reproduction occur?

#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 How does sexual

reproduction occur?

Human Fertilization & DevelopmentHuman Fertilization & Development

#50 How does sexual

reproduction occur?

#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 How does sexual

reproduction occur?

Regents PracticeRegents Practice

#50 How does sexual

reproduction occur?

#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 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?

#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 How does sexual

reproduction occur? SummarySummary

Let’s review each table’s flowchart.

#50 How does sexual

reproduction occur?

#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 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 PRACTICEReflection Reflection