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प्रश्न
Mention the name of man-made cereal. How it is formed?
उत्तर
Triticale, the successful first man-made cereal. Depending on the ploidy level Triticale can be divided into three main groups:
- Tetraploidy: Crosses between diploid wheat and rye.
- Hexaploidy: Crosses between tetraploid wheat Triticum durum (macaroni wheat) and rye.
- Octoploidy: Crosses between hexaploid wheat T. aestivum (bread wheat) and rye. Hexaploidy Triticale hybrid plants.
संबंधित प्रश्न
How many chromosomes do drones of honey bees possess?
Describe the structure of chromosomes with a suitable diagram.
Describe the structure of sex-chromosomes.
When two different genes came from the same parent they tend to remain together.
Write the observed phenotypic ratio.
From the following identify the INCORRECT statement/s with respect to the chromosomes.
i. Chromosomes are capable of self replication and play vital role in heredity, mutation, variation, and evolutionary development of eukaryotic species.
ii. Chromosomes are visible during cell division.
iii. Chemically eukaryotic chromosomes are made of mRNA, histone and non-histone proteins.
iv. The number of chromosomes varies within the population of a particular species.
Identify the term that represents the degree of repetition of the primary basic number of chromosomes in a cell.
From the following identify the statements that are CORRECT with respect to homologous and non-homologous region of X and Y chromosomes.
i. Non-homologous region of X chromosome is longer and contains more genes than that of non-homologous region of Y chromosome.
ii. X-linked genes are present on nonhomologous region of X-chromosome.
iii. Y-linked genes are present on homologous region of Y-chromosome.
iv. Crossing over occurs only between homologous regions of X and Y chromosomes.
At secondary constriction I, ______ becomes organized during interphase.
Extranuclear inheritance occurs in ______.
Extranuclear inheritance is a consequence of presence of genes in ______.
In a certain taxon of insects some have 17 chromosomes and the others have 18 chromosomes. The 17 and 18 chromosome-bearing organisms are ______.
Which three scientists independently rediscovered Mendel’s work?
Chromosomal theory of inheritance was given by ______.
How many types of gametes would be produced if the genotype of a parent is AaBB?
What would be the genotype of the parents if the offspring have the phenotypes in 1:1 proportion?
A couple has two daughters. What is the probability that the third child will also be a female?
During mitosis, chromosomes distribution to the daughter cell is ______.
Genes located on same locus but having different expressions are:
