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In pea plants, the colour of the flower ...

In pea plants, the colour of the flower is either violet of white whereas human skin colour shows many gradations. Explain giving reasons how it is possible.

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A cross between a red flower bearing plant and a white flower bearing plant of Antirrhinum produced all plants having pink flowers. Work out a cross to explain how this is possible.

A cross between a red flower bearing plant and a white flower bearing plant of Antirrhinum produced all plants having pink flowers. Work out a cross to explain how this is possible.

In peas, tallness is dominate over dwarfness, and red colour of flowers is dominant over the white colour. When a tall plant bearing red flowers was pollinated with a dwarf plant bearing white flowers, the different phenotypic groups were obtained in the progeny in numbers mentioned against them Tall, Red = 138 Tall, White = 132 Dwarf, Red = 136 Dwarf, White = 128 Mention the genotypes of the two parents and of the four offspring types.

During a mohohybrid cross involving a tall pea plant with a dwarf pea plant, the offspring populations were tall and dwarf in equal ratio. Work out a cross to show how it is possible.

In sweet Pea , the flower colour changes from Red to white and seed coat colour from grey to white. This is an example of

A teacher wants his/her students to find the genotype of pea plants bearing purple coloured flowers in their school garden. Name and explain the cross the will make it possible.

A teacher wants his/her students to find the genotype of pea plants bearing purple coloured flowers in their school garden. Name and explain the cross that will make it possible.

In a particular plant species majority of the plants bear purple flowers. Very few plants bear white flowers. No intermediate colours are observed. If you are given a plant bearing purple flowers, how would you ascertain that it is a pure breed for that trait? Explain.

A tall pea plant bearing violet flowers is given with its unknown genotyoes. Explain by working out the crosses how would you find the correct genotypes with respect to the two traits mentioned only by "selfing" the given plants.

Assertion: In four o'clock or snapdragon plant, a cross between a homozygous white-flowered individual and a homozygous red-flowered one produces pink-flowered plants. Reason: In these plants, the flower colour is determined by three alleles. a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion. b) If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. c) If Assertion is true but the Reason is false. d) If both Assertion and Reason are false.

ALLEN-GENETICS -Question
  1. If p^(2)+2pq+q^(2)=1. Explain this algebraic equation on the basis of ...

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  2. During a monohybrid cross involving a tall pea plant with a dwarf pea ...

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  3. If there is a history of haemophilia in the family, the chances of mal...

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  4. What does Hardy-Weinberg Principle of equilibrium indicate? List any t...

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  5. The F2 progeny of a monohybrid cross showed phenotiypic ans genotypic ...

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  6. In pea plants, the colour of the flower is either violet of white wher...

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  7. (a) Why is human ABO blood group gene considered a good example of mul...

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  8. (i)How does a chromosomal disorder differ from a Mendelian disorder? ...

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  9. Linkage and crossing-over of genes are alternatives of each other. Jus...

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  10. During a monohybrid cross involving a tall pea plant with a dwarf pea ...

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  11. Explain the genetic basis of blood grouping in human population.

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  12. (a) Dihybrib cross between two garden pea plant one homozygous tall wi...

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  13. Why are thalassemia and hemophilia categorized as Mendelian disorders ...

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  14. How do m-RNA, t-RNA and ribosomes help in the process of translation ?

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  15. (a) Why are colour blindness and thalassemia categorized as Mendelian ...

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  16. A tall pea plant bearing violet flowers is given with its unknown geno...

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  17. (a) How are Mendelian inheritance, polygenic inheritance arid pleiotro...

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  18. Plan an experiment and prepare a flow chart of the steps that you woul...

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  19. A pea plant producing yellow coloured and round seeds is given with un...

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  20. Using punnett square show the F2 results of a dihybrid cross where the...

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