58. Following are certain statements regarding the activities of homeotic genes of classes A, B and C involved in floral organ identity: A. Activity of A alone specifies sepals B. […]
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CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
APETALA1 and APETALA2: Key Regulators of Class A Activity in Arabidopsis Floral Organ Development
Based on ABC model during flower development, loss of class A activity results in the formation of only stamen and carpel. Which of the following floral organ identity genes controls […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Understanding AGAMOUS Mutant Phenotype and Gene Expression Patterns in Arabidopsis Floral Development
56. In Agamous mutant (flower within flower phenotype) which of the following statements is valid? (1) Class A genes are expressed in the first two whorls, Class B genes are […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Role of APETALA2 Gene in Sepal and Petal Development in Arabidopsis Flowers
Plants with apetala2 mutation show a phenotype that lacks (1) sepals only. (2) both sepals and petals. (3) petals only. (4) stamens only. Introduction APETALA2 (AP2) is a key floral […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Impact of APETALA3/PISTILLATA Mutation on Petal and Stamen Development in Arabidopsis Flowers
Which of the floral whorls is affected in apetala 3/pistillata (ap3/pi) mutants? (1) Sepals and petals. (2) Petals and stamens. (3) Stamens and carpels. (4) Sepals and stamens. Introduction Floral […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
AGAMOUS Gene Function in Floral Organ Development: Impact on Stamens and Carpels
Which of the floral whorls is affected in agamous (ag) mutants (1) Sepals and petals (2) Petals and stamens (3) Stamens and carpels (4) Sepals and carpels Introduction The AGAMOUS […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Impact of B-Class Gene Mutation on Floral Organ Identity in Arabidopsis: The ABC Model Explained
Floral organ development is controlled by overlapping expression of ‘A’ class, ‘B’ class and ‘C’ class genes in different whorls. In an Arabidopsis mutant, the flowers had sepals, sepals, carpels […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Role of Flowering Locus T (FT) as a Mobile Signal from Leaves to Shoot Apical Meristem in Floral Transition
51. Among the following which gene product migrates from leaves to shoot meristem during transition of shoot meristem into floral meristem? (1) Flowering locus T (2) Flowering locus D (3) […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Role of SEPALLATA Genes in Floral Organ Development: Excluding Sepals from SEP Function
In plants gene ‘sepallata’ is NOT involved in formation of organ (1) Sepals (2) Petals (3) Stamens (4) Carpels Introduction SEPALLATA (SEP) genes are a group of MADS-box transcription factors […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Impact of B-Type Gene Mutation on Flower Whorl Composition in Arabidopsis: Understanding the ABC Model
Three classed of genes A, B and C regulates the development of flower in Arabidopsis. If a loss-of-function mutation occurs in the B-type genes, what will be the composition of […]
