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प्रश्न
Who had proposed the chromosomal theory of inheritance?
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उत्तर
Sutton and Boveri independently proposed the chromosomal theory of inheritance in 1902. The two workers found a distinctive connection between the transmission of Mendelian hereditary elements (genes) and chromosome activity during gamete production and fertilisation. They proposed that chromosomes carried Mendelian factors. During meiosis, both chromosomes and genes segregate and assort independently before recombining in the zygote during fertilisation. Morgan, Sturtevant, and Bridges enlarged upon the chromosomal theory of inheritance.
संबंधित प्रश्न
Define the term ‘genome’.
Sketch and label the structure of chromosome.
State the difference between meiocyte and gamete with respect to chromosome number.
Distinguish between X andY chromosomes. (Mention any 'two' points.)
Name the type of cell division involved in the production of sperms by honey bees.
Distinguish between X and Y chromosomes.
Describe the structure of sex-chromosomes.
The A and B genes are 10 cm apart on a chromosome. If an AB/ab heterozygote is test crossed to ab/ab, how many of each progeny class would you expect out of 100 total progeny?
Codon – anticodon interactions occur by
A B B C C D E F G H I
From the above figure identify the type of mutation and explain it.
Write the salient features of the Sutton and Boveri concept.
During cell division, spindle fibres get attached to the disc shaped structures present on the centromere are known as ______.
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.
Chromosomal theory of inheritance was put forth by ______
A plant having the genotype AABbCC will produce ______ kinds of gametes.
Extra nuclear chromosomes occur in ______.
Extranuclear inheritance is a consequence of presence of genes in ______.
Experimental verification of ‘chromosomal theory of inheritance’ was done by ______.
A couple has two daughters. What is the probability that the third child will also be a female?
There was a mix-up at the hospital after a fire accident in the nursery division. Which of these children belong to the parents?
During mitosis, chromosomes distribution to the daughter cell is ______.
What do you mean by locus?
Consider the following information and answer the question that follows:
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Make a single pedigree chart using the above information to show the pattern of inheritance of phenylketonuria (PKU) in the family of Reshma.
Which chromosome in the human genome has the highest number of genes?
