Triple Lesson Notes

Question 1

What is the process of mitosis?

Answer 1

1) . 2 chromosomes in 2 pairs
2) . Chromosomes are replicated (into chromatids)
3) . The chromosomes line up (in homologous pairs)
4) . The chromosomes cross over and swap material
5) . Chromatids separate as spindle fibres pull them apart to polar opposites of the cell
6) . Chromatids line up and spindle fibres line up again
7) . Chromosomes become chromatids again by spindle fibres
8) . 4 daughter cells are born

Question 2

What is selective breeding?

Answer 2

Selective breeding is breeding animals with desirable characteristics/genes

Question 3

What is cloning?

Answer 3

Cloning is the replication of DNA

Question 4

What is genetic engineering?

Answer 4

Genetic engineering is genetically modifying DNA to give an organism desirable characteristics