III. HOAT DONG DAY HOC 1 Kiem tra
TAO GIONG BANG PHXTdNG PHAP GAY DOT BIEN VA CONG NGHE TE BAO
I. MUC TIEU 1. Kien thiirc 1. Kien thiirc
- HS giai thfch dugc quy trinh tao gidng mdi bdng phuang phap gay dot bidn.
- HS n6u dugc mdt sd thanh tuu tao gidng thuc vat bang cdng nghe td bao. - Trinh bay dugc ky thuat nhan ban vd tfnh d ddng vat.
2. KT nang
Ren mdt sd ky nang:
- Phan tfch, suy luan, khdi qudt. - Van dung ly thuydt vao thuc td. - Xfl ly thdng tin.
II. CHUAN Bj
- Tranh hinh SGK phdng to.
- Tu lieu vd thanh tuu chgn gidng d ddng vat, thuc vatt lien quan tdi bai cua HS. - Sdch "Cdng nghe sinh hgc cay trdng" tac gia Dd Nang Vjnh.
- Sach "Cdng nghe sinh hgc" tdc gia Vfl Van Vu, Nguydn Mgng Hung trang 43, 51,56.
III. HOAT DONG DAY - HOC 1. Kiem tra 1. Kiem tra
- Ngudn bidn di di truydn cua qudn thd vat nudi dugc tao ra bdng nhiing each nao?
- Thd nao la uu the lai? Phuong phdp tao gidng lai cho uu the lai? - Tai sao uu thd lai cao nhat d Fl va giam ddn d ddi sau?
2. Trong tam
Giai thfch quy trinh tao gidng bdng phuong phap dot bien.
3. Bai mdi.
Mo bai: GV ddn ddt: Trong tu nhi6n sinh vat cd cdc ddt bidn, tuy nhien
nhiing dot bidn cd gid trj kinh td khdng nhidu cho nen cdc nha khoa hgc tidn hanh gay dot bidn nhan tao dd tang ngudn bidn di cho chgn lgc. Quy trinh nay dugc thuc hien nhu the nao?
Hogt ddng I
TIM HI^U TAO GIONG BANG PHUONG PHAP GAY D O T BIl^N Muc tieu:
- HS hidu va trinh bay dugc cdc khau trong quy trinh gay dot bidn nhan tao.
- HS nhan bidt dugc cac dang dot bidn d cay trdng va vat nudi. - HS bie't van dung ly thuydt vao thuc tidn.
Hogt dpng cda GV
- GV n6u thdng tin:
+ Dung tia phdng xa (a, (3, Y) xuyen qua md sd'ng kfch thfch va. ion hod cdc nguyen tfl dd gay ddt bidn gen, ddt bidn NST.
Hogt dpng cda HS Ndi dung