1、 abstract: in this experiment, we chose allium sativum as the material. we got a lot of activity floristic cells through cultivating the roots of allium sativum. then we disposed the cells in order to observe the whole processes of the mitosis.key words: mitosis interphase prophase metaphase anaphas
2、e telopha-allium sativum 2n=16carnoy(95%31)1mol/lhcl1. 42.0cm1000,14h2. 1mol/lhcl60,.4min5hcl3. 1/35min -1interphase-1(a)prophase-1(b)metaphase-1(c)anaphase-1(d) telophase-1(e)1900-11001500-170024min31.5mm456 abstract: in this experiment, we chose zea mays as the material. we got a lot of cells in m
3、eiosis. then we disposed the cells in order to observe the whole processes of the meiosis.key words: meiosis leptonema zygonema pachynema diplonema diakineses-(zea mays 2n=20)carnoy(95%31)1 830-1030200-400carnoy2 ,3 4%4-24h0.5%4-24h254 45%5-21 2 3 4 5 6 abstract: in this experiment, we chose allium
4、sativum as the material. we got a lot of activity floristic cells through cultivating the roots of allium sativum. then we put colchicine into the water. after about 36 hours, we disposed the polyploid cells in order to observe themselves. key words: polyploidy colchicine-allium sativum 2n=16carnoy(
5、95%311mol/lhcl 1 2.0cm0.13648h2 3 5min-3a (b)-3(a)2n=16(b)4n=32-1 2 322n324n323 4 900-11001500-17005 4min6 1.5mm7 8 9 drosophila melanogaster-2n=8 abstract: drosophila melanogaster is a classic material of studying genetics. as we all know, drosophila melanogaster has a 2n number of 8, which means w
6、e could easy to observe it. especially for its larval salivary chromosome, it is very huge and clear. so it is called huge chromosome. in this experiment through the observation of the salivary chromosome to explore the structure of chromosome.key words: drosophila melanogaster salivary chromosome-1
7、00-200,drosophila melanogasterhcl(1mol/l)1 23-25,2 1/3-3 1mol/lhcl2-34 3-45 56 5-1. -11 2 1/3-3 4 drosophila melanogaster-10-142n=8 abstract: drosophila melanogaster is a classic material of studying genetics. firstly, it is easy for us to collect and to feed. secondly, as we all know, drosophila me
8、lanogaster has a 2n number of 8, which means we could easy to observe it, furthermore, it also has numerous of gene mutations. finally, its biocycle is very shorttherefore it can generate a generation in only 10-14 days. in this experiment we performed the three-point mapping in drosophila melanogas
9、ter.key words: drosophila melanogaster three-point mapping-drosophila melanogaster+wmsn1 7-82 3 5 ()3 3-5254 7-8f15 f1 4-5 f16 f13525787 f2f2 1 f2f2862 m-sn sn-w m-w+ + + 102 0 0 0+ + sn 10 10 10 0+ m + 29 29 0 29+ m sn 22 0 22 22w m sn 42 0 0 0w + + 42 0 42 42w + sn 27 27 0 27w m + 19 19 19 0859312
10、0 2932 1 f12 3 -4 mus musculus 2n=40- abstract: mus musculus , whose cells in bone marrow have a powerful energy in division,is a classic material in learning genetics. in this experiment, we chose the bone-marrow-cell as the material. we got a lot of activity cells from its bone marrow. then we disposed theh cells in order to observe the structure of the chromosome.key words: bone marrowchromosome-mus musculusgiemsa-1:11 10mg100ml8.5gnacl1000ml0.85%5.59gkcl1000ml0075%2 5g2h-3 - 2%2%2%4 1000r/min10min5 5ml3720min6 1000r/min10min15min,7 -1:12-38
