Chapter 9 Heredity and Evolution – HI MCQ!

If T is for tallness and t for dwarfness, what shall be the genotype of a tall pea plant according to Mendelism?

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The more characteristics two species have in common?

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Basket of vegetables contains carrot, potato, radish and tomato. which of them represent the correct homologous structures?

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If a couple has three daughters, what are the chances that the fourth child will be a son?

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The F2 phenotype ratio of a monohybrid cross studied by Mendel is?

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Which of the following statement is or are correct?

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The gene which decides the appearance of an organism even in the presence of an alternative gene is known as dominant gene.
Gregor Mendel was the first scientist to make a systematic study of patterns of inheritance which involved the transfer of characteristics from parents to progeny.
The gene which can decide the appearance of an organism only in the presence of another identical gene is called a recessive gene.
All the above

In humans if gene B gives brown eyes and gene b gives blue eyes, what will be the colour of eyes of the persons having combinations (i) Bb and (ii) BB?

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Pure-bred pea plant A is crossed with pure¬bred pea plant B. It is found that the plants which look like A do not appear in Fj gene¬ration but re-emerge in F2 generation. Which of the plants A and B are tall and dwarf?

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Identify the two organisms which are now extinct and are studied from their fossils?

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Process of selecting individuals with desired characters by man is called?

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