Class 10 Science | Meiotic cell division

Science and Technology, Grade 10 · Unit 4

Meiotic Cell Division

One cell, four gametes · Crossing over · Significance

By the end of this lesson you can

🔬

Define meiosis and say where it happens

🔢

Track the chromosome count from 2n to n

🔀

Explain crossing over and the variation it brings

⭐

State why meiosis matters

👥Diploid (2n)

Chromosomes in pairs

46 in humans

Body cells, zygote

👤Haploid (n)

Half the mother cell's number

23 in humans

Sperm, egg

The notes are free to read in full.

Presenter notes: Today we learn how sperms and eggs are made. The body uses a special division for this.