-
Genetic material is only DNA, RNA, etc.
The main genetic material is only DNA on chromosomes, and there is also a point that the genetic material in the cytoplasm is present in the mitochondria, and the chloroplast can only be ** in the mother.
-
Genetic material --- DNA or RNAThe genetic material of most living things is DNA; The genetic material of some viruses is RNA, such as tobacco mosaic virus.
Genetic factors --- genes. Mendel gave genes the name genes when he studied the laws of heredity as genetic factors. Later, people learned that the genetic factors he was talking about were actually the genes we were talking about.
-
1. All genetic material refers to the material that carries genetic information, that is, nucleic acid, including DNA and RNA, most organisms use DNA as genetic material, and some viruses use DNA as genetic material, and the other part uses RNA as genetic material.
Genetic factors refer to the influence of heredity on other things, for example, human traits are determined by both genetic and environmental aspects, among which heredity can also be called a factor that determines traits, that is, genetic factors. Another example is that people's physical and mental development is determined by genetics, environment, education and other factors, which are called factors.
-
The two answers are analytically similar, and the genetic material generally includes DNA and a part of RNA, etc., which refers to some vectors that specifically determine the inheritance of organisms. The genetic factors are relative to the environmental factors, and the factors that determine the specific manifestations of an organism are divided into internal and external factors, the internal factors are genetic factors, and the external factors are environmental factors, which jointly determine the specific characteristics of the organism. In terms of question type, the questioner is too serious, and the general situation is to choose A
-
Genetic factors, i.e. genes, traits. Specifically, it is the nature and shape of the object next to it, such as size, height, color, etc. "Traits" are superficial phenomena that people perceive, and their recurrence has some intrinsic cause.
Genetic factors are known to be composed of 4 regions:
1. The lead bucket of the coding region, including exons and introns.
2. In the leading region, Huaiqimo is located in the upper tract of the coding region, which is equivalent to the non-coding region (non-translating region) at the end of RNA 5'.
3. The caudal gyrus region, located downstream of the RNA3' coding region, is equivalent to the terminal non-coding region (untranslated region).
4. Control area, including start-up mover and enhancer, etc. The flanks of the genetically coding region are also known as flanking sequences.
-
DNA is the main genetic material.
1.Chromosomes are present in eukaryotic cells and are mostly made up of DNA and proteins, but DNA is the genetic material.
It is a biological macromolecule formed by the polymerization of many deoxynucleotides, and the chemical composition of deoxynucleotides includes phosphoric acid, bases, and deoxyribose.
3 There are two types of Streptococcus pneumoniae (prokaryotes): R bacteria are capsule-free, have coarse colonies, and are non-toxic. S bacteria have capsule, smooth colonies, and are toxic, which can cause pneumonia in humans and mice, and death in mice complicated by sepsis.
4 Transformation experiments for Streptococcus pneumoniae.
1) In vivo lead cultivation transformation experiment: in 1928, it was carried out by British microbiologist Griffiths et al. It is inferred that the S-type bacteria that have been heated to death contain a certain active substance-transformation factor that promotes the transformation of R-type live bacteria into S-type live bacteria.
2) In vitro transformation experiments: In the 40s of the 20th century, it was carried out by American microbiologist Avery et al.
Conclusion: DNA is the substance that causes stable genetic changes in type R bacteria (i.e., the transformation factors mentioned above).
5 In the chemical composition of T2 bacteriophages (bacteria and viruses that can only replicate and proliferate in living bacteria), 60% are proteins and 40% are DNA. Analysis of these two substances showed that only the protein molecule contains sulfur and phosphorus is almost always present in the DNA molecule.
Bacteriophage is a virus that specifically parasitizes in the body of E. coli, its head and tail shell are composed of proteins, the head contains phages to infect E. coli, it will use the substances and energy in E. coli to synthesize its own components under the action of its own genetic material, and carry out a large number of replication and proliferation. When the phage proliferates to a certain number, E. coli lyses, releasing a large number of phages.
-
The basic unit of human genetic material is genes, and the main genetic material is DNA. Genes (genetic factors) are all the nucleotide sequences required to produce a polypeptide chain or functional RNA. Genes support the basic structure and performance of life and are essential for human development.
The nature of genetic material.
Definition: The material that transmits genetic information between parents and offspring.
Chemical nature: Except for some viruses whose genetic material is RNA and prions, which are proteins, the genetic material of the rest of the viruses and all organisms with typical cellular structures is DNA.
Site of presence: This substance is the main component of chromosomes. It is also found in organelles like plastids, mitochondria, etc., outside the nucleus.
Basic characteristics: relative stability, self-replication, progeny maintain a certain continuity and produce heritable'Variation.
Conclusion: The genetic material of the vast majority of organisms (cellular structure organisms and DNA viruses) is DNA, so DNA is the main genetic material.
Since classical molecular biology theories are based on the study of prokaryotes, new problems arise when people apply traditional concepts to higher organisms, such as mammals. For example, in higher organisms, despite the totipotency of germ cells, the gene expression profiles of different types of cells are often very different during ontogeny, and cell fate also undergoes significant differentiation. Importantly, cell differentiation events are heritable until the completion of development, and cells of the same type form form various tissues that perform independent functions. >>>More
No, it's all DNA. The genetic material of eukaryotes is DNA (e.g., yeast), prokaryotes (e.g., bacteria), but viruses can be DNA (e.g., AIDS) or RNA (tobacco mosaic virus) or proteins (paravirus), but viruses are not eukaryotes. Nor is it a prokaryotic organism.
Absolutely. There are chromosomes in the nucleus, and there is DNA on the chromosomes, and DNA is the genetic material.
1.Heredity simply refers to the selection of existing genotypes in the parent's genes and the recombination of new expressions, while variations include those obtained directly from the parents and their own. >>>More
The entry point of nail disease is -5 disease, -6 is diseased, and the birth of -3 is diseaseless, indicating that nail disease is autosomal dominant inheritance. >>>More