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प्रश्न
What are the possible blood groups likely to be inherited by children born to a group A mother and a group B father? Explain your reasoning.
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उत्तर १
The mother with blood group A has genotype IAIO. The father with blood group B has genotype IBIO. Hence ,the possible genotypes of the children will be IAIB, IAIO, IBIO and IOIO. Thus, the possible blood groups of the children will be AB, A, B and O.
उत्तर २
The mother with blood group A has genotype IAIO. The father with blood group B has genotype IBIO. Hence ,the possible genotypes of the children will be IAIB, IAIO, IBIO and IOIO. Thus, the possible blood groups of the children will be AB, A, B and O.
उत्तर ३
The mother with blood group A has genotype IAIO. The father with blood group B has genotype IBIO. Hence ,the possible genotypes of the children will be IAIB, IAIO, IBIO and IOIO. Thus, the possible blood groups of the children will be AB, A, B and O.
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संबंधित प्रश्न
How do Mendel’s experiments show that the traits may be dominant or recessive?
How did Mendel interpret his results to show that traits may be dominant or recessive? Describe briefly.
Define heredity.
List any two contrasting characters other than height that Mendel used in his experiments in pea plants.
Fill in the following blank with suitable word .
In pea plants, the gene for dwarfness is ..............whereas that for tallness is ............ .
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?
What will you get in the F1 and F2 generations in the following cross?
Pure tall pea plant × Pure dwarf pea plant
Give the contrasting traits of the following characters in pea plant and mention which is dominant and which is recessive:
Yellow seed
What are the units of heredity.
In order to ensure that he had pure-breeding plants for his experiments, Mendel :
(a) cross-fertilised each variety with each other
(b) let each variety self fertilise for several generations
(c) removed the female parts of the plants
(d) removed the male parts of the plants.
A pregnant woman has an equal chance of her baby being blood group A or blood group AB. Which one of the following shows the possible genotypes of the woman and the father of her child?
(a) IA IA and IB IO
(b) IA IB and IB IO
(c) IA IO and IB IO
(d) IA IB and IA IO
A man with blood group A marries a woman with blood group O and their daughter has blood group O. Is this information enough to tell you which of the traits-blood group A or O - is dominant? Why or why not?
A person first crossed pure-bred pea plants having round-yellow seeds with pure-bred pea plants having wrinkled-green seeds and found that only A-B type of seeds were produced in the F1 generation. When F1generation pea plants having A-B type of seeds were cross-bred by self-pollination, then in addition to the original round-yellow and wrinkled-green seeds, two new varieties A-D and C-B type of seeds were also obtained.
(a) What are A-B type of seeds?
(b) State whether A and B are dominant traits or recessive traits.
(c) What are A-D type of seeds?
(d) What are C-B type of seeds?
(c) Out of A-B and A-D types of seeds, which one will be produced in (i) minimum numbers, and (ii) maximum numbers, in the F2 generation?
"It is possible that a trait is inherited but may not be expressed." Give a suitable example to justify this statement.
Explain the mechanism of hereditary changes.
Who is the pioneer of modern genetics?
Write the advantages of heredity.
Assertion: When pure breed tall plants are crossed with pure breed short plants, all the plants in F1 progeny are tall. When the tall plants of F1 progeny are crossed, short plants re-appear in F2 progeny.
Reason: Traits are independently inherited.
A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because
If a round, green seeded pea plant (RR yy) is crossed with wrinkled, yellow seeded pea plant, (rr YY) the seeds produced in F1 generation are
