CN2181723Y - Chromosome and gene action and heredity principle demonstrator - Google Patents

Abstract

The utility model relates to a chromosome and gene action and heredity principle demonstrator, which is characterized in that a plurality of magnetic strip-shaped structures representing chromosome are adsorbed and arranged on the front surface of an iron base board, and moreover, two rods of identical shape and size in the strip-shaped structure can be hinged and separated through a convex post and a hole, and therefore, various actions of the chromosome in the cell and the heredity principle and rule of the gene on the chromosome can be visually and directly demonstrated by combining the assembly, the move, etc. on the strip=shaped structure.

Description

Chromosome and gene action and heredity principle demonstrator

The utility model relates to a kind of novel middle school and university's biology teaching aid.

Chromosomal various actions when the division of cell and fusion are the bases of explaining the biological heredity rule.For cooperating the problem that solves this respect, (China Patent No. 88220985.X) though a teaching aid is provided, it designs defectiveness still to unique formal teaching aid " zooblast meiosis magnetic force motility model ", and is uneconomical at present.It is plastic casing that original device is made up of four parts, ringshaped magnet, iron bar structure, base plate, its ultimate principle is the lip-deep iron bar structure of ringshaped magnet adsorbent equipment that makes plastic casing interior, must use a large amount of ringshaped magnets like this, be distributed widely in the plastic casing, both uneconomical and magnetic force skewness is inevitable.

The utility model is that a kind of improved instrument will be provided, and it can reduce the consumption of magnet, and magnetic effect is better.In addition, put on some English alphabets of expression some " genes " again on " list structure ", this had both increased the function of this device, and made relevant issues express accurately clearly.

The purpose of this utility model is achieved in that allows " list structure " to have magnetic (as imbedding small magnet etc.), and only replace plastic casing, ring-shaped magnetic, base plate with an ovum sections matter base plate, can reach equally and utilize magnetic force to allow " list structure " to move the purpose of combination at any time according to the teaching needs on the instrument surface.And between two bars of " list structure ", projection and hole are arranged respectively, like this can be according to the teaching needs, allow the two hinged or separate at any time.

Obviously, the utility model is simple in structure, cost is low, the demonstration better effects if, the configuration of suitable vast especially middle school.

Concrete structure of the present utility model is provided by the following drawings and enforcement:

Fig. 1 is the synoptic diagram of irony base plate described in the utility model;

Fig. 2 is that the utility model is represented the synoptic diagram of chromosomal " list structure ";

Fig. 3 is an A-A diagrammatic cross-section among Fig. 2.

Below in conjunction with description of drawings most preferred embodiment of the present utility model.

This instrument is made up of two parts:

1) irony base plate ［ 1 ］, its positive approximate avette as figure, with expression cell longitudinal profile, the structure of its edge projection ［ 2 ］ expression cell membrane, cell membrane;

2) outline line that " list structure ", each this structure comprise two complete homotypes is the bar bar ［ 3 ］ of radian slightly, and wherein one is provided with projection ［ 4 ］, and another is provided with hole, makes both hinged just, and can unclamp.There is the letter of expression gene in each bar bar front, and inside is embedded with button shape small magnet ［ 5 ］.The utility model has some shapes, slightly different " list structure " of size, utilizes self magnetic and arranges in the iron plate front.

The teaching aid that the utility model provides is multi-functional, as long as suitably use, its purposes can reach six:

1, can represent chromosome structure and the relation between them;

2, can represent the position of gene, aobvious recessive relation and genetic process thereof;

3, can demonstrate the main process of cell mitogen;

4, can demonstrate the main process of reductional cell division, and in conjunction with the explanation of the gene on chromosome law of segregation, the law of independent assortment;

5, can demonstrate Sex determination and sex-linked inheritance;

6, can represent genome and autodiploid, triploid, tetraploid.

Claims (3)

1, the behavior of a kind of chromosome and gene and genetic principle demonstrator is characterized in that being become with the magnetic strip structural group of adsorbing by the irony base plate, and the magnetic list structure is arranged in the base plate front, and can move at random.

2, demonstrator according to claim 1 is characterized in that described magnetic list structure comprises two forms, identical bar of size, and is hinged by projection and hole between two bars, and separable.

3, demonstrator according to claim 1 is characterized in that described magnetic list structure adopts magnetic material.

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