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In mungbean, resistance to yellow mosaite virus and powdery mildew wer

In mungbean, resistance to yellow mosaite virus and powdery mildew were introduced by

  1. Tissue culture
  2. Mutalion breeding
  3. Selection
  4. Hybridisation.
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- In the pea plant, contrasting characters can Phenotype : The external apperance of an be easily recognized. individual for any trait is called phenotype for - The seven different charaters in pea that trait. It is observable and is determined by plant were controlled by a single factor different combinations of alleles. e.g. In pea, each. The factors are located on separate for the height of stem (plant) tall and dwarf are chromosomes and these factors are the two phenotypes (Tall is determined by TT transmitted from generation to generation. or Tt and dwarf by ). - He introduced the concepts of dominance Genotype : Genetic constitution or genetic and recessiveness. make up of an organism with respect to a Before learning about Mendel's particular trait. It is representation of the genetic experiments let us get acquainted with genetic constitution of an individual with respect to terms and symbols. a single character or a set of characters. e.g. Genetic Terminology : pea tall plants can have genotype TT or Tt and Character : It is a specific feature of an dwarf has tt. organism e.g. height of stem. Homozygous (pure): An individual possessing Trait : An inherited character and its detectable identical allels for a particular trait, is called variant e.g. Tall or dwarf. homozygous or pure for that trait. Factor : It is a unit of heredity, a particle Homozygous breeds true to the trait and present in the organism which is responsible for produces only one type of gametes e.g., tall the inheritance and expression of a character. with TT and dwarf with tt. (factor is passed from one generation to the Heterozygous : An individual possessing next through gametes). Factor determines a contrasting alleles for a particular trait, is genetical (biological) character of an organism. called heterozygous. Heterozygous does not Gene : It is a particular segment of DNA which breed true for that trait and produces two types is responsible for the inheritance and expression of gametes e.g. generation hybrids (Tt). Alleles or Allelomorphs : The two or more individuals (population) which is homozygous alternative forms of a given gene (factor) or true breeding for one or more traits, are called alleles of each other. They occupy constitutes pure line i.e. plant which breeds true identical loci (positions) on homologous for a particular character. It is a descendent of chromosomes. Allele is a short form of a single homozygous parent produced after self Allelomorph. fertilization. Dominant : It is an allele that expresses its trait fertilization. Monohybrid : It is heterozygous for one trait even in the presence of an alternative allele i.e. Monohybrid. It is heterozygous for one trait in heterozygous condition only. Alternatively, parents differing in single pair of contrasting the allele that expresses in dominant. (It is an allele of a pair that masks characters e.g. Hybrid tall produced in a cross the expression of other allele in generation.) between pure tall and pure dwarf parents. It is a Recessive : This allele is not expressed heterozygote for a single pair of alleles. in the presence of an alternative allele (in generation : It refers to the first filial heterozygous condition). It expresses only in generation. It consists of all off-springs the presence of another identical allele. It is an produced from a parental cross. Alternatively, it allele that does not express in hybrid. is first generation from a given mating between pure parents having contrasting characters.
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thot limes no pountessionals and proper medication. It is the consultation boys and girls should be given help of ted thrould in eversibh Summary \mathrm{O}_{\mathrm{u}} \mathrm{gh}_{\mathrm{r}} \mathrm{s}_{\mathrm{i}} \mathrm{b} / \textrm The with Terease The of - Any agents may be biological, nutritive, chemical, physical or mechanical. erfonnance, difarirus. Common cold is also a viral disease which is caused by a rhinovirus. Thisvirus infects the Perpespiratory iract but does mot affeco the lungs. Tsphoid is amost common communicable disease caused due to infection of bacteria, Salmonella typhi. cunoebiasis in bumans is caused by a protozoan parasite, Entamoeba histolytica. It generally resides jo the upper part of colon. Its feeding trophozoite stage causes dysentery and the tetranucleate cyst is the infective stage. Nagriaris a disease caused due to infection of a pathogenic sporozoan protozoan, Plasmodium. Female Anopheles mosquito acts as its vector. Four species of Plasmodium-P. vivax, P. falciparum, P. malariae and P. ovale cause benign tertian, malignant tertian, quartan and ovale malaria respectively. Ascariasis is caused by monogenetic parasite, Ascaris. This parasite resides in human intestine. Its eccond stage rhabditis larva is infective stage which infects humans through contaminated food and water. Filariasis is caused by digenetic parasite Wuchereria bancrofti and W, matayi. Aedes and Anopheles mosquitoes are its intermediate host. Adult worms are found inextricably coiled in the lymph glands and vessels of man as a result of which flow of lymph is obstructed causing elephantiasis or filariasis. kingworm or tinea is a common skin disorder caused by fungal infection. It is a highiy contagious disease and its treatment is. very difficult. This is called immunity. For immunity, there is a immune system in the body whose study is called mminology? 4 hamunity is of two iypes - Innate and acquired. Innate immunity is natural anc inherent It is fast and onl-specific. Inmune system of the body functions with the help of lymphocytes. Lymphocytes are of two types analysed Bhymphocytes and T-lymphocytes. These are derived from specinc stem cells in the bone marro
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Question Text
In mungbean, resistance to yellow mosaite virus and powdery mildew were introduced by
Updated OnApr 10, 2023
TopicBiology in Human Welfare
SubjectBiology
ClassClass 12
Answer Type Video solution: 2
Upvotes196
Avg. Video Duration5 min