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Earn 100

The karyotype given below is related to

 

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Important Questions on Principles of Inheritance and Variation

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Study the given pedigree chart for sickle-cell anaemia and select the most appropriate option for the genotypes.

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A man and a woman, who do not show any apparent signs of a certain inherited disease, have seven children (2 daughters and 5 sons). Three of the sons suffer from the given disease, but none of the daughters are affected. Which of the following mode of inheritance do you suggest for this disease?
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Mrs. verma has a autosomal gene pair 'Bb' and she contain x-linked gene 'd' both on of her x-chromosome. What is the percentage of gamete which contain 'bd' genes :-
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If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind is :-
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A man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind?
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Due to nondisjunction of chromosomes during spermatogenesis, some sperms carry both sex chromosomes (22A+XY) and some sperms do not carry any sex chromosome (22A+O). If these sperms fertilise normal eggs (22A+X), What types of genetic disorders respectively appear among the offspring?
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If both parents are carriers for thalassemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?
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The disease sickle-cell anaemia is caused by the substitution of (i)... by (ii).... at the (iii).... position of (iv).... globin chain of the haemoglobin molecule. Which of the following correctly fills the blanks in the above statement?