Technology of storage and primary processing of agricultural products

Get the job done.
Chromosomes can be observed in permanent preparations by cutting roots in microns .
Metaphase is found in the prepared drugs using a small eyepiece and a lens . Immersion lens, 90x and 10x okulyar each chromosome in the study mumkin.Keyin paper using a drawing apparatus to draw the shape, structure of chromosomes.
The location of the centromere, satellite portion, and secondary bonds on the chromosomes in the image is then determined. By numbering each chromosome separately, you can find the total number of chromosomes in the cell . Using the drawing apparatus RA-4, it is possible to capture the metaphase state of chromosomes .
Issues to be solved independently
1.  Observe the chromosomes by placing the prepared drug under a microscope and draw a picture in the laboratory notebook.
2.  Determine the number by dividing it into metacentric, submetacentric, acrocentric, and telocentric forms depending on the chromosomes drawn.

8 LABORATORY WORK.

Topic: The study of the molecular basis of heredity

The purpose of the work. To study the structure of DNA and RNA and the location of nucleotides in them. It consists of obtaining information about the code table and studying the process of protein synthesis in the ribosome.
The content of the work. The chromosome is the organelle of the cell that determines the genetic laws of each organism and is located in the nucleus.
The chromosome consists of 45% DNA and 55% RNA protein-histone . It has now been established that DNA is directly related to heredity . Therefore, the study of its structure and function is a major task of modern genetics.
The nucleotides in the two chains are linked by hydrogen bonds of nitrogenous bases . Adenine is always associated with Thymine and Guanine with Cytosine. The two strands of DNA are formed in this way and complement each other.
Nucleotides are arranged in a specific order in each DNA strand.
F F
A N T
F F
F F
G N Ts
F F
Each specific type of plant and animal DNA . The DNA molecule of a species has a specific number of nucleotides (10 to 25,000) and a specific order of their location. DNA during mitosis divide the Interfax two times the reduplikatsiya feature. DNA controls protein synthesis in the cell through RNA.
The structure of the RNA molecule differs from that of DNA . RNA nucleotides contain ribose carbohydrates, not deoxyribose. The thymine nucleotide is replaced by the uracil nucleotide.