This lesson contains 12 slides, with text slides and 2 videos.
Lesson duration is: 60 min
Items in this lesson
Welcome everyone!
Today:
Explanation of sexual reproduction (page 213)
Making homework
Slide 1 - Slide
Flower of the week: Foxglove
Slide 2 - Slide
Flower rapeseed
Rapeseed after flowering
Slide 3 - Slide
What are we going to study today?
Today we are going to learn:
What sexual reproduction is.
How sex cells are made.
How fertilization can occur in animals.
Slide 4 - Slide
Sexual reproduction
Sexual reproduction requires 2 sex cells, one male and one female. Because of the sex cells, there is always a difference between the parent and the child.
Slide 5 - Slide
Cell division
Normally, during cell division, all chromosomes (strands of DNA in the cell nucleus) are copied and moved to a new cell.
Slide 6 - Slide
Sex cells
The making of sex cells happens in almost the same way. The big difference is that not all chromosomes are copied and transferred, but half only half of them. This is also called meiosis.
Slide 7 - Slide
Fertilization
The fusion of the two sex cells is called fertilization. This occurs in different ways. When the egg is fertilized outside the body, this is called external fertilization. This occurs frequently in fish.
Slide 8 - Slide
Slide 9 - Video
Fertilization
When fertilization occurs inside a body, it is called internal fertilization. This occurs in many land animals. For this, animals must mate.
Slide 10 - Slide
Slide 11 - Video
Homework
The homework for the next lesson are the assignments from paragraph 6.6, including the summary and plus exercise. You need to start with that now.
Lesson duration is: 60 min
