CN214042764U - Direct-reading character segregation ratio demonstrator - Google Patents

Abstract

The utility model discloses a direct-reading character separation ratio demonstrator in the technical field of teaching aids, which comprises a bottom plate, wherein the top of the bottom plate is vertically provided with a display vertical plate, the display vertical plate is provided with two counters which are arranged side by side left and right, the front side of the display vertical plate is provided with two hollow ball distribution chambers which are arranged side by side and have independent cavities, the middle of the two hollow ball distribution chambers is transversely penetrated and provided with a rocking shaft, the left and right ends of the rocking shaft are respectively fixed on the bottom plate by arranging a vertical rod, the top end of the vertical rod is rotatably installed with the rocking shaft, the outer wall centers of the hollow ball distribution chambers at both sides are respectively provided with observation holes, the inner cavities of the hollow ball distribution chambers at both sides are respectively provided with two equivalent glass beads with different colors, the utility model can be used for demonstrating the dynamic process of randomly generating different genotype gametes in the reproduction process of organisms, and, the method has the characteristics of easy operation, record statistics and comparison.

Description

Direct-reading character segregation ratio demonstrator

Technical Field

The utility model relates to a teaching aid technical field specifically is a direct-reading type character separation ratio demonstration ware.

Background

The direct-reading character segregation ratio demonstrator is an experimental instrument for demonstrating the character segregation ratio simulation in a standard experimental textbook of common high school courses, namely biology 'must repair' 2 'heredity and evolution'. The method simulates the randomness principle of a sports lottery ticket lottery machine to demonstrate the dynamic process of random generation of gametes in the reproduction process of sexual reproduction organisms; the character display and recessive of the next generation generated by the random combination of the female gamete and the male gamete are recorded in a form similar to that of a poking abacus bead, and the character separation ratio can be directly displayed or read on a display board; the teacher improves the simulation of the character separation ratio experiment, mainly in two aspects, firstly improves the randomness of gamete generation, secondly increases the interest of experiment operation, and the student is not difficult to understand the randomness of gamete generation, but considers too fussy and not intuitive to the record and analysis process of the experiment result.

Based on this, the utility model designs a direct-reading character separation ratio demonstrator to solve above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a direct-reading type character separation ratio demonstration ware to solve above-mentioned technical problem.

In order to realize the purpose, the utility model provides the following technical scheme: the utility model provides a direct-reading type character separation ratio demonstrator, includes the bottom plate, the top of bottom plate is provided with the demonstration riser perpendicularly, it controls the counter side by side to be provided with two on the demonstration riser, the front side of showing the riser is provided with two and sets up and the independent clean shot distribution room of cavity side by side, two the centre of clean shot distribution room transversely alternates and is provided with the pivot of shaking, it is fixed in through setting up the pole setting respectively to shake the pivot about both ends, the pole setting top with the pivot pivoted mounting, both sides the outer wall center department of clean shot distribution room is equallyd divide and has been seted up the observation hole respectively, both sides the inner chamber of clean shot distribution room is equallyd divide and has respectively placed two kinds of equivalent, different colour's glass pearl.

Preferably, the counter comprises a U-shaped rod erected above the vertical display plate, two ends of the U-shaped rod are respectively fixed on a transverse plate on the front side of the vertical display plate and a bottom plate on the rear side of the vertical display plate, and the U-shaped rod is movably connected with a plurality of counting beads in series.

Preferably, the top end of the vertical rod is provided with a connecting sleeve, the end part of the rocking rotating shaft penetrates through the connecting sleeve, and a ball bearing is embedded in the inner cavity of the connecting sleeve.

Preferably, the diameter of the glass beads is larger than the diameter of the observation hole.

Preferably, one end of the swing shaft is connected with a swing handle.

Preferably, the outer wall of the hollow sphere ligand chamber is of a transparent structure.

Compared with the prior art, utility model's beneficial effect does:

the utility model discloses the randomness principle of imitative sports lottery ticket lottery machine demonstrates biology in the reproductive process, produces the dynamic process of different genotype gametes at random, is convenient for the student to understand and calculate the genetic probability.

The utility model discloses a transparent material preparation clean shot gamete room, the mysterious sense of eliminating the student to gamete random production helps them to understand the teaching content of genetic probability better, improves the classroom actual effect.

The utility model discloses direct display or reading out the character separation ratio on the counter that shows the riser, the experimental effect is directly perceived, and the science is vivid, provides supporting exploration laboratory glassware for high school biology new teaching material.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive work.

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic view of the internal structure of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1-bottom plate, 2-display vertical plate, 3-hollow sphere ligand chamber, 4-shaking shaft, 5-vertical rod, 6-observation hole, 7-glass bead, 8-U-shaped rod, 9-transverse plate, 10-counting string bead, 11-connecting sleeve and 12-shaking handle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.

Referring to fig. 1-2, the utility model provides a technical solution: a direct-reading character separation ratio demonstrator comprises a bottom plate 1, wherein a display vertical plate 2 is vertically arranged at the top of the bottom plate 1, two counters which are arranged side by side left and right are arranged on the display vertical plate 2 and are respectively used for recording a display and hiding result of each random experiment, each counter comprises a U-shaped rod 8 erected above the display vertical plate 2, two ends of each U-shaped rod 8 are respectively fixed on a transverse plate 9 at the front side of the display vertical plate 2 and the bottom plate 1 at the rear side of the display vertical plate 2, a plurality of counting beads 10 are movably connected on the U-shaped rods 8 in series, and finally the display and hiding character separation ratio can be directly obtained through the display and hiding recording results at two sides in an experiment; the front side of the display vertical plate 2 is provided with two hollow ball matching chambers 3 which are arranged side by side and have independent cavities, the outer wall of each hollow ball matching chamber 3 is of a transparent structure, the teaching content of genetic probability can be conveniently observed and understood, a swing shaft 4 is transversely arranged between the two hollow ball matching chambers 3 in an inserting manner, one end of the swing shaft 4 is connected with a swing handle 12 for swinging the two hollow ball matching chambers 3, the left end and the right end of the swing shaft 4 are respectively fixed on the bottom plate 1 through arranging upright rods 5, the top end of each upright rod 5 is rotatably installed with the swing shaft 4, the top end of each upright rod 5 is provided with a connecting sleeve 11, the end part of the swing shaft 4 passes through the connecting sleeve 11, the inner cavity of the connecting sleeve 11 is embedded with ball bearings, the centers of the outer walls of the hollow ball matching chambers 3 on two sides are respectively provided with an observation hole 6, the inner cavities of the hollow ball matching chambers 3 on two sides are respectively provided with two equal amounts of glass beads 7 with different colors, respectively represent a dominant gene and a recessive gene, the diameter of the glass beads 7 is larger than that of the observation hole 6, so that only one glass bead 7 is partially exposed out of the observation hole 6 without falling after each stop of shaking.

Working principle embodiment:

an equal number of glass beads 7 are put in the two hollow sphere ligand chambers 3 in advance, and the glass beads 7 in each hollow sphere ligand chamber 3 are divided into two colors, the number of the glass beads 7 of the two colors is the same, for example, 10 black glass beads 7 and 10 white glass beads 7 are put in each hollow sphere ligand chamber 3, wherein black is defined as dominant gene and white is defined as invisible gene, further, the black and white glass beads 7 in the left hollow sphere ligand chamber 3 are represented by a and a, and the black and white glass beads 7 in the left hollow sphere ligand chamber 3 are represented by B and B, so that each of a, B and B has 10; then, the two hollow ball matching chambers 3 are rotated by the rotating handle 12 for a plurality of circles and then stopped, the observation hole 6 is downward when the stopping is carried out, at the moment, only one glass bead 7 is exposed out of the observation hole 6 in each hollow sphere ligand chamber 3, the glass bead 7 is a randomly selected gene, therefore, four structures of AB, Ab, aB and AB can appear in the two hollow sphere ligand chambers 3, wherein AB, Ab and aB are dominant results, AB is invisible results, therefore, after one-time experiments, if the result combination is dominant, one counting bead 10 is dialed from one counter representing the dominant to the front side of the display vertical plate 2, and similarly, if the result combination is invisible, then, after another counting bead 10 is reached to the front side of the display vertical plate 2, the experiment is repeated for several times, the counting ratio of the two counters can be observed from the display vertical plate 2, namely the character segregation ratio of the random combination of the dominant and recessive genes.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; the term "connected" may refer to a direct connection, an indirect connection through an intermediate, a connection between two elements or an interaction relationship between two elements, and unless otherwise specifically defined, the term should be understood as having a specific meaning in the present application by those skilled in the art.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. A direct-reading character segregation ratio demonstrator is characterized in that: including bottom plate (1), the top of bottom plate (1) is provided with perpendicularly shows riser (2), show that be provided with on riser (2) two and control parallel counters, the front side that shows riser (2) is provided with two and sets up and independent clean shot distribution room (3) of cavity side by side, two the centre of clean shot distribution room (3) transversely alternates and is provided with shakes pivot (4), it is fixed in through setting up pole setting (5) respectively to shake pivot (4) about both ends, pole setting (5) top with it rotates the installation to shake pivot (4), both sides outer wall center department of clean shot distribution room (3) is equallyd divide and is do not seted up observation hole (6), both sides the inner chamber of clean shot distribution room (3) is equallyd divide and is respectively placed two kinds of equivalent, different colours glass pearl (7).

2. The direct-reading trait separation ratio demonstrator of claim 1, wherein: the counter is including erectting U-shaped pole (8) that show riser (2) top, the both ends of U-shaped pole (8) are fixed in respectively show on diaphragm (9) of riser (2) front side and the bottom plate (1) of showing riser (2) rear side, U-shaped pole (8) are gone up the activity and are concatenated a plurality of count string of beads (10).

3. The direct-reading trait separation ratio demonstrator of claim 1, wherein: the top of pole setting (5) is provided with adapter sleeve (11), it passes to shake pivot (4) tip adapter sleeve (11), the inner chamber of adapter sleeve (11) is inlayed and is equipped with ball bearing.

4. The direct-reading trait separation ratio demonstrator of claim 1, wherein: the diameter of the glass beads (7) is larger than that of the observation holes (6).

5. The direct-reading trait separation ratio demonstrator of claim 1, wherein: one end of the rocking rotating shaft (4) is connected with a rocking handle (12).

6. The direct-reading trait separation ratio demonstrator of claim 1, wherein: the outer wall of the hollow ball ligand chamber (3) is of a transparent structure.

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