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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.
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?
What is the genotype of dwarf plants which always produced dwarf offspring?
Why did Mendel choose pea plants for conducting his experiments on inheritance?
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 trait in an organism is influenced by ______
If the ratio of each phenotype of the seeds of pea plants in the F2 generation is 9 : 3 : 3 : 1, it is known as :
(a) tetrahybrid ratio
(b) monohybrid ratio
(c) dihybrid ratio
(d) trihybrid ratio
One of the following traits cannot be inherited. This one is :
(a) colour of eyes
(b) colour of skin
(c) size of body
(d) nature of hair
Which of the following statement is incorrect?
Figures (a) to (d) given below represent the type of ear lobes present in a family consisting of 2 children - Rahul, Nisha and their parents.
|
(a) Rahul's Father |
(b) Rahul |
(c) Rahul's Mother |
(d) Rahul's sister Nisha |
|
(e) |
(f) |
||
| Types of ear lobes | |||
Excited by his observation of different types of ear lobes present in his family, Rahul conducted a survey of the type of ear lobes found {Figure (e) and (f)} in his classmates. He found two types of ear lobes in his classmates as per the frequency given below:
| Sex | Free | Attached |
| Male | 36 | 14 |
| Female | 31 | 19 |
On the basis of the above data answer the following questions.
- Which of the two characteristics - ‘free ear lobe’ or ‘attached ear lobe’ appears to be dominant in this case? Why?
- Is the inheritance of the free ear lobe linked with the sex of the individual? Give a reason for your answer.
- What type of ear lobe is present in father, mother, Rahul and his sister Nisha? Write the genetic constitution of each of these family members which explains the inheritance of this character in this family.
(Gene for the Free ear lobe is represented by F and the gene for the attached ear lobe is represented by f for writing the genetic constitution).
OR
Suresh’s parents have attached ear lobes. What type of ear lobe can be seen in Suresh and his sister Siya? Explain by giving the genetic composition of all.
Rewrite the correct form of the statement by changing the first or last word only:
The inheritable feature of an organism is termed as heredity.
