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The least distance of distinct vision for a young adult with normal vision is about ______.
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Why is a normal eye not able to see clearly the objects placed closer than 25 cm?
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What happens to the image distance in the eye when we increase the distance of an object from the eye?
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How did Mendel explain that it is possible that a trait is inherited but not expressed in an organism?
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To perform an experiment to identify the different parts of an embryo of a dicot seed, first of all you require a dicot seed. Select dicot seeds from the following group:
Wheat, Gram, Maize, Pea, Barley, Ground-nut
(A) Wheat, Gram and Pea
(B) Gram, Pea and Ground-nut
(C) Maize, Pea and Barley
(D) Gram, Maize and Ground-nut
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With the help of two suitable examples, explain why certain experiences and traits earned by people during their lifetime are not passed on to their next generations. When can such traits be passed on?
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A Mendelian experiment consisted of breeding pea plants bearing violet flowers with pea plants bearing white flowers. What will be the result in F1 progeny?
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What constitutes the link between one generation and the next?
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Mendel said that the characteristics or traits of organisms are carried from one generation to the next by internal factors which occur in pairs. What is the modern name for these factors?
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State whether the following statement is true or false :
The sex of an infant is not a case of inheritance of characteristics.
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Name the first scientist who studied the inheritance of traits from one generation to the next.
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What type of plants were used by Mendel for conducting his experiments on inheritance?
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The gene for red hair is recessive to the gene for black hair. What will be the hair colour of a person if he inherits a gene for red hair from his mother and a gene for black hair from his father?
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Fill in the following blank with suitable word .
In pea plants, the gene for dwarfness is ..............whereas that for tallness is ............ .
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A man having blood group O marries a woman having blood group B and they have a daughter. What will be the blood group of the daughter?
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Name the scientist who gave the laws of inheritance.
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Using height (tallness/dwarfness) of a plant as an example, show that genes control the characteristics or traits in an organism.
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What will you get in the F1 and F2 generations in the following cross?
Pure tall pea plant × Pure dwarf pea plant
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It it an example of monohybrid cross or dihybrid cross?
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In the F2 generation of a cross, progeny having different traits are produced in the ratio 3 : 1. State whether it is a monohybrid cross or a dihybrid cross? Give one example of such a cross.
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